2017年6月英语四级真题第3套 Part III Section C (2)
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2017年6月英语四级真题第3套 Part III Section C (2)

说明文 · 阅读理解(四选一) · 真题文章逐层精读

本页是 2017年6月英语四级真题第3套 Part III Section C (2) 文章的精读视角页——这篇说明文全文 346 词、9 段,CEFR 难度 B2(B2 级在英语四级文章中占 46%),作者立场为「积极支持」;英文原文之外,本篇已有的 11 项精读维度逐项展开,其中能迁移到其他英语四级真题文章的判断方法(篇章结构、修辞、言外之意、作者态度、体裁速判)随各维度一并讲透。

精读最佳实践

本页解析里的段号(P1)都可以点——点一下,原文在顶部翻开并定位到该段,解析引用的原文同步标亮;合上原文,你还停在刚才读到的位置。点 P1 试试。

PASSAGE · 文章原文

9 段英文原文

以下为2017年6月英语四级真题第3套 Part III Section C (2) 的阅读理解(四选一)原文,共 9 段。左侧 P1–P9 是段落编号——本页全部解析(结构、逐段、修辞、自检题)都以它为坐标回指原文,点击解析里的段号,原文即在顶部翻开并定位到该段、引用的原文同步标亮;合上原文仍停在当前阅读位置。原文保持卷面形态,不带翻译与标注。

The brain is a seemingly endless library, whose shelves house our most precious memories as well as our lifetime's knowledge. But is there a point where it reaches capacity?

The answer is no, because brains are more sophisticated than that. Instead of just crowding in, old information is sometimes pushed out of the brain for new memories to form.

Previous behavioural studies have shown that learning new information can lead to forgetting. But in a new study, researchers demonstrated for the first time how this effect occurs in the brain.

In daily life, forgetting actually has clear advantages. Imagine, for instance, that you lost your bank card. The new card you receive will come with a new personal identification number (PIN). Each time you remember the new PIN, you gradually forget the old one. This process improves access to relevant information, without old memories interfering.

And most of us may sometimes feel the frustration of having old memories interfere with new, relevant memories. Consider trying to remember where you parked your car in the same car park you were at a week earlier. This type of memory (where you are trying to remember new, but similar information) is particularly vulnerable to interference.

When we acquire new information, the brain automatically tries to incorporate(合并) it within existing information by forming associations. And when we retrieve(检索) information, both the desired and associated but irrelevant information is recalled.

The majority of previous research has focused on how we learn and remember new information. But current studies are beginning to place greater emphasis on the conditions under which we forget, as its importance begins to be more appreciated.

A very small number of people are able to remember almost every detail of their life. While it may sound like an advantage to many, people with this rare condition often find their unusual ability burdensome.

In a sense, forgetting is our brain's way of sorting memories, so the most relevant memories are ready for retrieval. Normal forgetting may even be a safety mechanism to ensure our brain doesn't become too full.

PARAGRAPHS · 逐段精读

9 段逐段主旨与解读

逐段拆解2017年6月英语四级真题第3套 的这篇原文——每段给出英文段落主旨、段落标题与中文解读,并提炼一条「这段为什么这样读」的具体方法。

  1. P1

    Does the Brain Have a Limit?

    The paragraph introduces the question of whether the brain has a storage limit.

    本段在全文中承担 opening 的作用:它先把大脑描述为储存丰富信息的“图书馆”,再提出是否会存满的问题,从而为后文解释 forgetting 的必要性建立逻辑入口。

    抓住设问
  2. P2

    Making Room for New Memories

    The brain avoids reaching capacity by replacing some old information with new memories.

    本段给出全文的核心 answer,并首次提出遗忘不是容量不足,而是 sophisticated brain 主动更新信息的方式;这与文章主旨中的“清除旧信息、容纳新信息”完全对应。

    答案加机制
  3. P3

    New Evidence on Forgetting

    A new study reveals how learning new information causes forgetting in the brain.

    本段把文章从一般性解释带入 scientific evidence,增强了“遗忘是大脑机制”这一观点的可信度,并为后文具体说明遗忘的功能和干扰现象作铺垫。

    新旧研究对照
  4. P4

    The Practical Benefits of Forgetting

    Forgetting helps people access new relevant information by reducing interference from old memories.

    本段用日常 PIN 场景具体证明遗忘的正面价值,直接支撑全文“forgetting is not a flaw”的中心论点,并解释它如何提升信息检索效率。

    由密码例子归纳
  5. P5

    Why Similar Memories Interfere

    New memories that resemble old ones are especially vulnerable to interference.

    本段从反面展示旧记忆保留过多的代价,即 interference;它与上一段的 PIN 例子形成呼应,进一步说明适度 forgetting 对准确提取新信息十分必要。

    锁定相似信息
  6. P6

    How Memory Interference Occurs

    Associative memory causes both desired and irrelevant information to be recalled together.

    本段为前文的干扰现象提供 brain-level explanation,说明问题并非记忆随机出错,而是大脑自动建立 association 的自然结果;这也反衬了遗忘筛除无关信息的必要性。

    追踪联想链条
  7. P7

    A Growing Focus on Forgetting

    Research is increasingly recognizing the importance of understanding forgetting.

    本段从学术研究角度再次确认遗忘的重要性,说明文章讨论的并非边缘现象,而是 memory science 正在重新评估的关键问题。

    比较研究重心
  8. P8

    The Burden of Remembering Everything

    The ability to remember almost everything can be burdensome rather than beneficial.

    本段通过极端案例从侧面论证遗忘的价值:如果什么都记得反而 burden,那么 normal forgetting 就不是缺陷,而可能是维持正常心理与认知功能的条件。

    重视转折评价
  9. P9

    Forgetting as a Protective System

    Normal forgetting sorts memories and protects the brain from information overload.

    本段是全文的 conclusion:它回扣首段“大脑会不会存满”的问题,并将前文的替换、干扰、检索和极端案例整合为最终观点——forgetting 是保障大脑高效运作的自然 safety mechanism。

    回扣容量问题
SELF CHECK · 段落自检题

9 道逐段细节自检题

针对2017年6月英语四级真题第3套这篇原文,每段配 1 道细节题( 1 个正确项 + 5 个干扰项 ,由懒笔记精读引擎基于本段命制,非试卷原题)。 选项默认中性;点「显示答案与解析」展开正确项、解析与最快解法,现代浏览器会同步高亮正确选项。

  1. 第 1 段 定位词 brain capacity

    What concern is raised about the brain's capacity?

    • A Why people store their most precious memories on library shelves.
    • B How people can increase the brain's capacity through study.
    • C Whether the brain can eventually become full of memories and knowledge.
    • D Why old knowledge is more precious than new memories.
    • E Whether memories are stored in different areas of the brain.
    • F How a lifetime of knowledge can be recovered after being lost.
    显示答案与解析 收起答案与解析

    正确答案:C

    该项准确改写了 reaches capacity:become full 对应 reaches capacity,memories and knowledge 对应 shelves 所容纳的内容。障碍在于原文先用了 library 比喻,考生必须还原其字面问题,而不能把 shelves 当成真实物体。

    问号句直取 时间紧张时,直接用题干中的 capacity 回扫 第1段,并只读包含问号的一个句子。随后把正确项当作答案项:选择能把 reaches capacity 压缩改写为 become full 的选项,不必逐个翻译所有选项。

  2. 第 2 段 定位词 new memories make room

    How does the brain make room for new memories according to the passage?

    • A By crowding all old and new information into the same space.
    • B By permanently expanding its physical size.
    • C By storing new memories separately from existing information.
    • D By sometimes pushing old information out so that new memories can form.
    • E By turning old information into more sophisticated knowledge.
    • F By preventing old memories from ever being recalled.
    显示答案与解析 收起答案与解析

    正确答案:D

    该项保留了 sometimes 的限定,并准确呈现 old information 被 pushed out 与 new memories form 的因果关系。障碍在于题干使用 make room,而原文使用 pushed out,考查同义理解。

    因果双端核验 先从 new memories 回扫 第2段,不逐句精读;只抓 Instead of 后的 pushed out 和 form。把正确项当作答案项,验证它是否同时含“旧信息离开”和“新记忆形成”两端,双端齐全即可选。

  3. 第 3 段 定位词 new study for the first time

    What did the new study demonstrate for the first time?

    • A That learning new information can lead to forgetting.
    • B Why all behavioural studies fail to explain memory loss.
    • C How the brain stores every new memory permanently.
    • D That memory loss occurs only after behavioural learning.
    • E How learning new information can lead to forgetting in the brain.
    • F Why researchers should stop studying new information.
    显示答案与解析 收起答案与解析

    正确答案:E

    该项准确保留 how this effect occurs in the brain 的机制重点,并将 this effect 回指 learning new information can lead to forgetting。障碍是考生需要完成指代还原,不能只选“学习可能导致遗忘”这一旧结论。

    指代加机制 用 for the first time 精确跳到 第3段,先画出前一句的 effect,再读 how this effect occurs。正确项作为答案项必须同时覆盖 effect 和 how;少一个机制维度的选项立即淘汰。

  4. 第 4 段 定位词 old PIN benefit

    What benefit does forgetting the old PIN provide?

    • A It allows the bank to reuse the old number for another customer.
    • B It makes the new bank card unnecessary.
    • C It ensures that both PINs can be recalled equally well.
    • D It prevents a person from losing a bank card again.
    • E It speeds up the delivery of a replacement card.
    • F It improves access to the relevant new number by reducing interference from the old one.
    显示答案与解析 收起答案与解析

    正确答案:F

    该项把 improves access to relevant information 和 without old memories interfering 合并改写,准确说明遗忘的功能。障碍是 relevant information 被具体化为 new number,考生需理解 PIN 在例子中的指代范围。

    例末结论回收 用 old PIN 锁定 第4段 后,跳过叙事细节,直接扫最后一句的 improves 和 without。把正确项作为答案项,检验它是否同时包含“提取更顺”与“旧记忆少干扰”两个结果。

  5. 第 5 段 定位词 particularly vulnerable interference

    What kind of memory is particularly vulnerable to interference?

    • A Memory for new information that is similar to information learned earlier.
    • B Memory for information that is entirely new and unrelated to past experience.
    • C Memory for the exact location of a lost bank card.
    • D Memory for highly emotional events from childhood.
    • E Memory for information recalled repeatedly over a lifetime.
    • F Memory for old information that has no recent equivalent.
    显示答案与解析 收起答案与解析

    正确答案:A

    该项完整改写括号中的定义:new 对应 new,similar 对应 similar,earlier 对应 a week earlier 或旧信息。障碍在于原文用停车场例子承载抽象定义,考生需从例子上升到类别。

    双条件勾选 以 particularly vulnerable to interference 原词跳至 第5段,优先读括号,因为说明文括号常直接下定义。正确项作为答案项必须同时满足 new 和 similar 两个勾选条件,缺一即排。

  6. 第 6 段 定位词 retrieve information what may happen

    What may happen when people retrieve information?

    • A Only the desired information is recalled.
    • B Both the wanted information and associated but irrelevant information may be recalled.
    • C The brain forms associations only after retrieval.
    • D All irrelevant information is permanently removed.
    • E Existing information is no longer connected with new information.
    • F People recall information only when they deliberately try to forget it.
    显示答案与解析 收起答案与解析

    正确答案:B

    该项忠实保留 both...and... 的并列范围,以及 desired 与 associated but irrelevant 的对照。障碍在于考生容易只注意 desired information,忽略造成干扰的第二个并列成分。

    并列结构验全 以 retrieve information 定位 第6段 后半句,只扫描 both...and... 平行结构。正确项作为答案项必须保住两个 recalled 对象;只保留其中一项的选项可立刻删除。

  7. 第 7 段 定位词 current studies emphasize

    What are current studies beginning to emphasize?

    • A How people learn and remember new information.
    • B Ways to eliminate all normal forgetting.
    • C The conditions under which people forget.
    • D The physical limits of the brain's size.
    • E Why rare memory abilities are always beneficial.
    • F How to replace lost bank cards more efficiently.
    显示答案与解析 收起答案与解析

    正确答案:C

    该项直接对应 current studies are beginning to place greater emphasis on the conditions under which we forget。障碍在于前句的 learn and remember new information 词汇更熟悉,容易被误选为当前重点。

    转折右侧取焦点 直接以 current studies 定位 第7段,利用 But 做左右切分:左侧是淘汰区,右侧是候选区。正确项作为答案项应是 right side 中 place greater emphasis on 的宾语。

  8. 第 8 段 定位词 rare memory condition feel about their ability

    How do people with the rare memory condition often feel about their ability?

    • A They consider it an advantage in every aspect of life.
    • B They are unable to remember details of their lives.
    • C They feel no different from most other people.
    • D They often find it burdensome despite its apparent advantage.
    • E They believe their memories should be removed by researchers.
    • F They are pleased to forget irrelevant information quickly.
    显示答案与解析 收起答案与解析

    正确答案:D

    该项准确概括 often find their unusual ability burdensome,并保留 despite 表达的让步关系。障碍是 advantage to many 只是外部公众的直觉,不是拥有者的真实体验。

    让步后取真意 以 rare condition 找到 第8段,见 While 立即把句子切成“公众印象”和“当事人感受”。正确项作为答案项只能对应 often find 所在半句,不能选 advantage to many 所在半句。

  9. 第 9 段 定位词 normal forgetting function

    What function of normal forgetting is highlighted in the passage?

    • A It guarantees that every memory will remain available for retrieval.
    • B It makes the brain store more irrelevant memories.
    • C It prevents people from acquiring new information.
    • D It enables people to recall old and new PINs at the same time.
    • E It sorts memories so that the most relevant ones are ready for retrieval.
    • F It proves that the brain has a fixed and limited storage capacity.
    显示答案与解析 收起答案与解析

    正确答案:E

    该项直接改写 forgetting is our brain's way of sorting memories, so the most relevant memories are ready for retrieval。障碍是 sorting 是比喻性动作,考生要理解其结果是提升相关信息的可提取性。

    目的链压缩匹配 题干中的 normal forgetting 可直达 第9段;只提取 so that 前后的因果骨架。正确项作为答案项,应把 sorting 与 relevant memories ready for retrieval 两部分连在一起,其他细节不必反复核读。

STRUCTURE · 篇章结构

9 个意群的说明文骨架

按说明文 的行文骨架切分意群,每个意群标注它覆盖的段落与对主旨的作用——逐段读完后回到这里俯瞰全篇,能看清作者为什么按这个顺序行文。

  1. 引出话题:大脑容量问题

    通过 library metaphor 比喻和 capacity question 设问,引出 central topic:大脑是否有 storage limit

    作为 opening paragraph,通过 rhetorical question 制造 suspense,naturally lead readers 进入对 brain capacity 这一 scientific topic 的思考

    提出核心问题
  2. 核心论点:遗忘的积极机制

    直接给出 negative answer 并揭示 key mechanism:大脑通过 push out old information 为 new memories 腾出空间,这是 sophisticated process 而非简单的 crowding

    作为 thesis statement paragraph,establish 文章的 central argument:forgetting 不是 defect 而是 deliberate mechanism。这个 sense group 为后续的 evidence 和 elaboration 提供 theoretical foundation

    阐明遗忘机制
  3. 科学证据:研究支持

    引入 scientific evidence:previous studies 显示 learning-forgetting connection,而 new research 首次在 brain level 展示这一 effect 的 occurrence

    作为 evidence paragraph,通过 cite research findings 增强 thesis 的 credibility。从 behavioral studies 到 brain-level demonstration 的 progression 展示了 scientific understanding 的 advancement

    提供实验依据
  4. 具体实例一:银行卡密码

    通过 bank card PIN replacement 这个 relatable example 解释 forgetting 的 practical advantage:记住 new PIN 时 gradually forget old one,这 improve access to relevant information 并 prevent interference

    作为 first concrete example,将 abstract concept 转化为 everyday scenario,让 readers understand forgetting 的 functional value。这个 sense group demonstrate 了 relevance principle

    例证遗忘益处
  5. 具体实例二:停车位记忆

    通过 parking location memory 这个 common frustration 说明 old memories interfere with new ones 的问题,强调这类 similar information 的 memory 特别 vulnerable to interference

    作为 second example 与前一个 form parallel structure,从不同 angle (interference problem) 支持 central idea。这个 sense group 展示了 forgetting 的 necessary 性

    例证记忆干扰
  6. 机制解释:记忆的形成与检索

    从 cognitive mechanism 层面解释:大脑 acquire new information 时会 form associations,而 retrieve 时 both desired and irrelevant information 会被 recall,这说明 interference 的 neural basis

    作为 explanation paragraph,从 examples 回到 mechanism,提供 deeper understanding of 为什么 forgetting 是 necessary。这个 sense group bridge concrete examples 和后续的 research discussion

    解释认知机制
  7. 研究趋势:关注遗忘条件

    指出 research focus 的 shift:从 how we learn and remember 转向 conditions of forgetting,这反映了对 forgetting importance 的 increasing appreciation

    作为 research trend paragraph,展示 academic community 对 forgetting 认知的 evolution。这个 sense group 通过 describe research shift 间接 reinforce main thesis 的 significance

    指出研究方向
  8. 反面案例:完美记忆的负担

    引入 extreme case:少数 remember almost every detail 的人 often find 这种 rare ability burdensome,这从 opposite direction 支持了 forgetting 的 value

    作为 counterexample paragraph,通过 negative case (too much memory) 反向证明 normal forgetting 的 benefit。这个 sense group 用 by-contrast logic strengthen main argument

    反证遗忘必要
  9. 总结升华:遗忘的本质意义

    作为 conclusion 重申并 elevate main idea:forgetting 是 brain's sorting mechanism,确保 most relevant memories ready for retrieval,甚至可能是 safety mechanism to prevent brain overload

    作为 concluding paragraph,将前面的 evidence, examples, and explanations synthesize 为 final insight。'In a sense' 这样的 reflective language 标志对 topic 的 higher-level understanding,complete 整个 argumentative arc

    总结核心观点
MAIN IDEA · 速判主旨

5 步定位这篇文章的主旨

不读完全篇也能锁定主旨——以下 5 步按2017年6月英语四级真题第3套 这篇原文的实际行文顺序给出,每步说明看哪里、看出什么,可直接迁移到其他英语四级文章。

  1. 首段疑问定中心 P1

    说明文的 first paragraph 通常会 raise a question 或 present a phenomenon,这个 opening question 往往就是整篇文章要 explore 的 central issue。本文开头就问 brain 是否有 capacity limit,这个 question 直接引出了后续所有的 explanation

  2. 次段答案明立场 P2

    说明文在 raise question 后会 immediately provide 一个 direct answer 或 clear position。第二段用 'The answer is no' 直接回应了首段的 question,并用 'because' 给出 rationale。这个 answer paragraph 包含了文章的 core argument

  3. 中段例证不改旨 P3 P4 P5 P6 P7 P8

    中间段落要么提供 scientific evidence(如第三段的 'researchers demonstrated'),要么进行 mechanism explanation(如第四到六段的 examples 和 process description)。这些段落都在 support 第二段提出的 core claim,而不是 introducing new arguments

  4. 尾段总结呼应首 P9

    说明文的 final paragraph 通常会 restate 或 synthesize main idea。第九段用 'In a sense' 进行 summarization,并用 'forgetting is our brain's way of' 来 encapsulate 整个 mechanism。这个 conclusive statement 与第二段的 answer 形成 echo

  5. 三层结构成主旨 P2 P6 P9

    说明文主旨包含三个 components:direct answer(brain 没有 fixed capacity)、underlying mechanism(forgetting 是 sophisticated process)、functional significance(这是 essential 而非 flaw)。单独任何一个 component 都不够 complete,必须整合才能形成 full understanding

主旨信号词 no P2 sophisticated P2 advantages P4 automatically P6 essential P9 mechanism P9

MAIN IDEA · 主旨

这篇文章在说什么

大脑没有固定的容量限制。遗忘是一种复杂的机制,它会清除旧信息为新的相关记忆腾出空间,从而改善信息检索并防止干扰。这种自然过程对大脑功能至关重要,而非缺陷。
The brain has no fixed capacity limit. Forgetting is a sophisticated mechanism that removes old information to make room for new, relevant memories, improving information retrieval and preventing interference. This natural process is essential for brain function, not a flaw.
WORD INFERENCE · 生词推断

5 个生词的上下文推断

不查词典,只用文中线索推出词义——每个词给出推断出的释义与 完整推理链。已收录进英语四级高频真题词集的单词可点击进入词条页。

  • sophisticated 复杂精密的;高级的

    让我们把这些 clues 串联起来。首先,从 context 看,文章用 'The answer is no' 否定了 brain 会像 library 一样 reach capacity 的简单理解,然后用 'more sophisticated than that' 来说明 brain 的特殊性。这个 'more...than' structure 本身就暗示了程度的提升。其次,后面紧接着解释 brain 有 push out old information 的 mechanism,这显然比单纯的 storage 要复杂得多。再从 word structure 来看,-ated 结尾和较长的词形都指向这是个表达复杂概念的 formal term。最后,全文的 thesis 就是在阐述 brain 的 memory management 是多么 intricate and intelligent,sophisticated 这个词正好承担了 introduce 这个核心观点的 function。所有这些 evidence 都指向同一个方向。

    对比结构+构词特征+主旨验证
  • vulnerable 易受伤害的;脆弱的;易受影响的

    现在我们来 synthesize 这些 clues。First,从 semantic context 来看,第4段 和 第5段 都在讨论 memory interference 这个 phenomenon,特别是 old memories 和 new but similar memories 之间的 conflict。第5段 明确提到这会导致 frustration,是个 problematic situation。Then,vulnerable 修饰的 memory type 正是最容易出现这种 interference 的类型。Second,从 morphology 角度,-able suffix 本身就携带'易于被...的'这个 semantic feature。Third,'particularly vulnerable to interference' 这个 structure 中,particularly 加强了程度,to interference 指明了方向,整个 phrase 描述的是一种 high susceptibility to negative impact。把这三个 aspects 结合起来,答案就很清晰了。

    负面情境+表性质后缀+介词短语方向
  • incorporate 合并;纳入;整合

    让我们 connect the dots。First,从 immediate sentence structure 看,'incorporate it within existing information' 这个 pattern 清楚地显示了 direction:把 'it'(new information)放到 'existing information' 里面,'within' 这个 spatial preposition 强化了这个 idea。Second,'by forming associations' 这个 method clause 说明了 how——通过创建 links 和 connections。Third,从 paragraph logic 看,incorporate 的结果是产生 associations,这些 associations 在 retrieval 时会被一起 recall,说明 new info 确实被整合进了 existing memory network。Fourth,从 article's central theme 看,brain 是在 actively managing 和 organizing information,不是 passively storing,incorporate 正是这种 active integration 的核心动词。所有 evidence 都指向同一个 meaning。

    句法结构+方式说明+结果追踪+主题对齐
  • retrieve 检索;取回;恢复

    现在 let's integrate all the clues。First,最直接的 evidence 来自 第6段 的 parallel structure:'retrieve information' 和 'information is recalled' 放在同一个 sentence 的两个 clauses 里,而且有 'when...both...' 的 structure 连接它们,这强烈暗示它们是 synonymous 或至少 closely related。Second,第9段 中 'ready for retrieval' 的 context 显示这是 memory management 的最终目的——让 relevant memories 易于被 accessed。Third,从 morphology 看,'re-' prefix 表示 backward movement 或 restoration。把这三个 layers combine 起来:retrieve 就是从 memory storage 中 bring back 或 get information 的 process,和 recall 意思相近,只是更 formal 一些。

    同义平行+词形追踪+前缀解码
  • burdensome 繁重的;难以承担的;累赘的

    让我们 weave these threads together。First,从 immediate contrast 来看,'sound like an advantage' vs 'find...burdensome' 这个 structure 建立了明确的 opposition,burdensome 必然是 advantage 的反面,表示某种 disadvantage 或 negative quality。Second,从 word formation 看,-some suffix 表示'causing' 或'having the quality of',结合前面的 root(即使我们不确定 burden 的确切意思),整体结构暗示这是个 causing negative effects 的 adjective。Third,从 argumentative function 看,第8段 是用来支持 'forgetting is beneficial' 这个 central claim,通过展示 cannot forget 的 negative consequence。People find their perfect memory burdensome 正是因为它成了一种 heavy load 或 difficulty to carry。所有 clues 都 converge 到同一个 meaning。

    转折对立+表性后缀+论证功能
RHETORIC · 修辞手法

8 处修辞手法与仿写

每处修辞给出它在本文的具体用法、同类信号词清单与一份可直接套用的 写作仿写建议——读完能认,也能写。

  • 打比方

    P1

    作者用 library 和 shelves 来比喻 brain 和它的 storage capacity,这个 metaphor 非常巧妙地将抽象的 brain function 具象化为我们熟悉的 library system。这种 comparison 帮助 readers 快速理解大脑的 information storage 特性,同时为后文讨论 capacity limit 和 memory management 奠定了基础。通过这个 vivid image,作者暗示大脑像图书馆一样需要 organize 和 sort information,这直接支撑了文章的 central argument:forgetting 是一种 sophisticated sorting mechanism。

    信号词 like as similar to resembles can be compared to is analogous to mirrors parallels

    仿写: 当你需要解释 abstract 或 complex concepts 时,问自己:这个概念的 key characteristic 是什么?日常生活中有什么 familiar thing 具有类似的 feature?比如要解释 immune system,可以比作 security system;要说明 data processing,可以用 factory assembly line。仿写模版:【抽象概念】is like【具体事物】, whose【具体特征A】represents【抽象特征A】as well as【具体特征B】represents【抽象特征B】。

  • 举例子

    P4

    作者用 bank card PIN 这个 concrete example 来说明 forgetting 的 practical advantage。这个 instance 非常贴近 daily experience,every reader 都能 relate to the situation of remembering new PIN 而 gradually forgetting old one。这个 specific case 完美展示了文章的 key point:forgetting old information 可以 improve access to relevant information,防止 old memories interfering with new ones。Example 的选择很精准,因为 PIN memory 是典型的需要 replace old with new 的场景。

    信号词 for instance for example such as like imagine consider take suppose say

    仿写: 选择 examples 时要考虑:它是否 universally relatable?是否 clearly demonstrate 你要说明的 point?是否能 eliminate potential confusion?使用 transitional phrases 引入:Imagine, for instance / Consider, for example / Take the case of。确保 example 后面有 explicit connection 回到 main idea。仿写模版:Imagine, for instance, that【具体情境】. 【情境中的具体行为/结果】. This process【如何体现主旨】, without【避免的问题】。

  • 举例子

    P5

    Car parking scenario 是第二个 concrete example,用来说明 memory interference 的 problem。这个 example 和前面的 PIN example 形成 complementary pair:PIN 展示 forgetting 的 benefit,parking 展示 not forgetting 的 frustration。这个 relatable situation 让 readers 体验到 similar information 造成的 confusion,强化了文章关于 forgetting 作为 sorting mechanism 的 argument。Example 的 specificity(same car park, a week earlier)增加了 authenticity。

    信号词 consider imagine think about suppose picture envision for instance for example

    仿写: 当需要说明 problem 或 challenge 时,选择 readers 普遍经历过的 frustrating situation。用 Consider trying to 这样的 structure 引导 readers 进入 scenario。关键是在 example 后面 explicitly state what type of 问题它 illustrates。可以用 contrast 的方式:一个 example 展示 positive aspect,另一个展示 negative aspect。仿写模版:Consider trying to【具体任务】in【具体情境】. This type of【概念类别】is particularly vulnerable to【问题】。

  • 引资料

    P3

    作者引用 previous behavioural studies 和 a new study 来支撑 forgetting mechanism 的 scientific basis。第一个 reference 建立了 existing knowledge base,说明 learning-forgetting connection 已有 evidence。第二个 reference 突出 innovation:这是 first time 在 brain level 展示这个 effect。这种 citation strategy 既显示 topic 的 research foundation,又强调文章讨论内容的 cutting-edge nature,增强了 argument 的 credibility 和 significance。

    信号词 studies show research indicates according to evidence suggests findings reveal data demonstrates experts argue scholars point out

    仿写: 引用 research 时要明确 what it shows 和 why it matters to your point。使用 attribution phrases:Previous studies have shown / Research demonstrates / According to。区分 established findings(用 have shown, indicate)和 new discoveries(用 demonstrated for the first time, recently revealed)。确保 citation 直接 support 你的 main argument。仿写模版:Previous【研究类型】have shown that【已知发现】. But in a new study, researchers demonstrated for the first time【新发现】。

  • 作比较

    P7

    作者通过 contrasting two research focuses 来突出 paradigm shift:从 how we learn and remember 转向 when we forget。这个 comparison 揭示了 forgetting research 的 emerging importance。通过 juxtaposing majority of previous research 和 current studies,作者强调了 perspective change,暗示 forgetting 不再被视为 failure,而是值得深入研究的 mechanism。这个 contrast 为文章的 positive view of forgetting 提供了 academic context。

    信号词 but however while whereas in contrast on the other hand conversely unlike compared to

    仿写: 建立 comparison 时要确保 two elements 具有 comparable dimension。使用 contrastive structures:The majority of X focused on A, but Y is beginning to emphasize B。或用 while/whereas 连接:While X does A, Y does B。明确 what aspect 你在比较,以及 why this difference matters。Comparison 应该 serve your main point,不是为了对比而对比。仿写模版:The majority of【过去群体/做法】has focused on【旧重点】. But【当前群体/做法】are beginning to place greater emphasis on【新重点】, as【原因/意义】。

  • 作比较

    P8

    这个 comparison 通过 contrasting a very small number of people 和 implied majority 来强化 normal forgetting 的 value。那些 remember almost every detail 的人本该 advantageous,但 actually find it burdensome。这个 paradox 通过 contrast 变得更加 striking。While 从句建立了 expectation(sound like an advantage),主句 subvert 了这个 expectation(find it burdensome)。这个 surprising comparison 为最后一段关于 forgetting as safety mechanism 的 conclusion 做了有力 preparation。

    信号词 while although though even though despite in spite of may seem... but appear to be... yet

    仿写: 使用 while 从句建立 expected scenario,然后用 main clause 呈现 actual reality,这能创造 thought-provoking contrast。结合 modality(may sound like, appear to be)和 adversative reality(actually, in fact)增强 contrast 效果。这种 technique 特别适合 challenge common assumptions。仿写模版:While it may sound like【预期优势】to many, people with【特定情况】often find their【特征】【实际缺点】。

  • 下定义

    P6

    作者在 第6段 用 technical language 定义了 memory 的 working mechanism:acquisition, incorporation through association, retrieval。这个 definition 解释了 why forgetting happens——因为 retrieval 时会 recall both desired and irrelevant information。这个 precise explanation 为理解 forgetting necessity 提供了 cognitive science foundation。Definition 使用了 process description(acquire → incorporate → retrieve),让 readers 理解 memory 不是 static storage 而是 dynamic process。

    信号词 is refers to means is defined as consists of involves is characterized by entails

    仿写: 定义 process 或 mechanism 时,使用 sequential structure(when X, Y happens; and when Z, both A and B occur)。包含 key components:action(acquire, retrieve),agent(the brain, we),result(forms associations, is recalled)。用 technical vocabulary 保持 precision,但确保 context 能让 readers understand。避免 circular definitions。仿写模版:When we【动作A】, the【系统】automatically tries to【处理方式】by【具体机制】. And when we【动作B】, both【预期结果】and【附带结果】【发生】。

  • 作诠释

    P9

    第9段 对 forgetting 进行了 interpretive explanation:它是 brain's way of sorting memories。作者用 In a sense 引入这个 interpretation,表明这是一种 conceptual understanding 而非 literal description。这个 explanation 赋予 forgetting positive meaning:不是 defect 而是 deliberate sorting,不是 problem 而是 safety mechanism。Interpretation 将前面所有 evidence 和 examples 整合成 coherent understanding,完成了从 phenomenon description 到 functional significance 的 升华。

    信号词 in a sense in other words essentially put differently what this means is in effect amounts to can be understood as

    仿写: 使用 hedging phrases(in a sense, in a way, essentially)引入 interpretation,表明这是 conceptual understanding。将 phenomenon 重新 frame 为 purposeful action(X is Y's way of doing Z)。用 so that 或 to ensure 连接 mechanism 和 purpose。Interpretation 应该 synthesize previous information 并 reveal underlying logic。结尾可以提升到 broader significance(not just X, but Y)。仿写模版:In a sense,【现象】is【主体】's way of【动作目的】, so【直接效果】. 【概念】may even be【更深层意义】to ensure【最终目标】。

IMPLIED MEANING · 言外之意

9 处话里有话

作者没有明说、但靠信号词传递出来的态度与暗示——每处给出原文片段、信号词类型与解读。

  • 大脑容量无限的表象被否定

    P1
    But is there a point where it reaches capacity? The answer is no, because brains are more sophisticated than that.

    转折类 But but however yet nevertheless nonetheless still

    表面上作者在 answer 一个关于 brain capacity 的 question,但 implicit message 是:大众对大脑的 understanding 停留在 simple storage model,这是 fundamentally flawed 的。通过这个 rhetorical device,作者为整篇文章的 central argument 奠定基础——forgetting 不是 capacity problem,而是 sophisticated processing mechanism。对 main idea 的 contribution 在于:它 establishes 了后续讨论的 premise,即我们需要 rethink forgetting from a more sophisticated perspective,而不是把它看作 limitation。

  • 遗忘的积极机制被引出

    P2
    Instead of just crowding in, old information is sometimes pushed out of the brain for new memories to form.

    对比类 Instead of instead of rather than as opposed to unlike in contrast to contrary to

    表层上是在 describe 大脑的 working mechanism,但 deeper implication 是:遗忘不是被动的 failure,而是主动的 management process。'Pushed out' 这个 verb 暗示了 intentionality 和 purposefulness。对 article thesis 的 significance 在于:这句话 reframes forgetting from negative (capacity limit) to positive (active optimization)。这个 cognitive shift 是全文 argument 的 cornerstone——后续所有关于 forgetting benefits 的 discussion 都建立在这个 reconceptualization 之上。

  • 研究证据层级的提升

    P3
    Previous behavioural studies have shown that learning new information can lead to forgetting. But in a new study, researchers demonstrated for the first time how this effect occurs in the brain.

    转折类+强调类 But, for the first time but now for the first time finally at last only recently not until

    表面是在 report 研究进展,但 implicit message 是:之前我们只知道 'what happens' (behavioral outcome),现在终于知道 'how it happens' (brain mechanism)。这个 distinction 对 scientific understanding 至关重要。对 main thesis 的 contribution 是:它 legitimizes 后续关于 forgetting mechanism 的 detailed explanation,因为现在有了 neural-level evidence。这增强了整篇文章的 scientific authority,让 'forgetting as beneficial' 这个 argument 更 convincing——不再是 speculation,而是 demonstrated mechanism。

  • 遗忘的实用价值凸显

    P4
    In daily life, forgetting actually has clear advantages. Imagine, for instance, that you lost your bank card.

    强调类+具体化类 In daily life, actually, clear advantages in daily life actually in fact indeed in reality in practice

    表面上是 providing example,但 deeper function 是 normalize 和 legitimize forgetting。通过 'actually' 这个词,作者在 counter 潜在的 negative perception——很多人觉得 forgetting is bad,但 'actually' 暗示:if you think about it,你会发现 forgetting is essential。PIN card example 不是 random choice,而是 carefully selected 因为它 universally experienced 且 consequences of not forgetting 很 obvious (会用错 PIN)。对 thesis 的 contribution 是:它把 forgetting 从 abstract neural process 转化为 personally relevant benefit,making 整个 argument 更 persuasive 和 memorable。

  • 旧记忆干扰的普遍性

    P5
    And most of us may sometimes feel the frustration of having old memories interfere with new, relevant memories.

    委婉表达+共情类 most of us may sometimes feel the frustration most of us many people we often sometimes may feel might experience

    表面是 acknowledging 一个 common problem,但 implicit purpose 是 setting up 对 forgetting mechanism 更深的 appreciation。通过承认 'frustration',作者在说:是的,memory interference 很 annoying,但这恰恰说明 forgetting mechanism 是 necessary 的——如果旧记忆不 fade,干扰会更严重。对 main argument 的 contribution 是:它 demonstrates 为什么 'forgetting is beneficial' 不只是 abstract principle,而是 addresses a real pain point。这让后续关于 forgetting as sorting mechanism 的 explanation 更有 practical relevance。

  • 记忆关联的双刃剑性质

    P6
    And when we retrieve information, both the desired and associated but irrelevant information is recalled.

    对比类+限制类 automatically, both...and, but irrelevant automatically both...and as well as along with but irrelevant unwanted

    表面在 describe 记忆检索的 process,但 implicit argument 是:正是因为 associative retrieval 是 indiscriminate,所以 forgetting 作为 filtering mechanism 变得 crucial。'Automatically' 暗示我们 cannot control 这个 process,'irrelevant' 暗示有 noise。对 thesis 的 significance 是:它 explains 为什么大脑需要 active forgetting——不是因为 storage limit,而是因为 retrieval 会 activate too much。这 deepens 对 forgetting function 的 understanding,从 'making room' 到 'reducing interference',which 是更 sophisticated explanation。

  • 研究重心的范式转移

    P7
    The majority of previous research has focused on how we learn and remember new information. But current studies are beginning to place greater emphasis on the conditions under which we forget, as its importance begins to be more appreciated.

    转折类+趋势类+因果类 The majority, But, beginning to, as the majority but current beginning to starting to increasingly growing emphasis

    表面在 review 研究趋势,但 deeper message 是:遗忘长期被 neglected 或 misunderstood,现在终于得到应有的 scientific attention。'Importance begins to be appreciated' 暗示过去的 underappreciation 是 misguided。对 article argument 的 contribution 是:它把整篇文章 position 在更大的 scientific context 里——这不只是介绍 forgetting,而是参与一个 emerging paradigm that revalues forgetting。这给文章的 thesis 增加了 intellectual weight 和 timeliness,suggesting 这是 cutting-edge understanding。

  • 完美记忆的反直觉弊端

    P8
    While it may sound like an advantage to many, people with this rare condition often find their unusual ability burdensome.

    让步类+转折类 While it may sound like, often find, burdensome while it may sound although it seems despite seeming contrary to expectation surprisingly ironically

    表面在 describe 一种 rare condition,但 argumentative function 是 definitively prove 'forgetting is beneficial'。通过展示 perfect memory 的 burden,作者在说:我们对 memory 的 common desire (remember everything) 是 fundamentally misguided。对 thesis 的 contribution 是 climactic——这是整个 argument 的 strongest evidence。如果那些 can remember everything 的人都觉得 burdensome,那么 normal forgetting 不只是 acceptable,而是 desirable。这个 counterintuitive example makes 后面关于 'forgetting as sorting' 的 conclusion 不可辩驳。

  • 遗忘作为优化机制的终极定位

    P9
    In a sense, forgetting is our brain's way of sorting memories, so the most relevant memories are ready for retrieval. Normal forgetting may even be a safety mechanism to ensure our brain doesn't become too full.

    总结类+强化类+比喻类 In a sense, even, safety mechanism in a sense in effect essentially even may even be serves as

    表面是 summarizing,但 actual function 是完成从 'forgetting as flaw' 到 'forgetting as essential design' 的 complete conceptual transformation。'Sorting' metaphor 把遗忘从 passive loss 变成 active organization,'safety mechanism' 更进一步,把它提升为 protective function。'May even be' 的 tentativeness 是 strategic——让这个 strong claim 听起来是 reasoned speculation 而非 dogmatic assertion。对 thesis 的 contribution 是 definitive closure——它把所有 previous points (no capacity limit, removes interference, improves retrieval, even perfect memory is burdensome) synthesize 成一个 unified conceptual framework:forgetting is sophisticated brain optimization,not limitation。

AUTHOR ATTITUDE · 作者态度

作者态度:积极支持

结论先行:本文作者态度为积极支持( Positive and appreciative toward forgetting)。下面是按步骤还原的判断过程与文中的态度信号词。

  1. 识别说明对象 P1 P2

    明确 topic 能帮助我们 anticipate 作者可能的 stance。说明文作者通常会对自己选择 elaborate 的 topic 持有某种 perspective,如果作者花大量篇幅 explain 某个 mechanism 的 benefits,很可能持 positive attitude。

  2. 开篇问答定调 P1 P2

    说明文中作者回答问题的 manner 和 tone 反映态度。如果用 'no, because' 这种 assertive structure,并搭配 positive descriptors like 'sophisticated',说明作者不仅在 inform,更在 advocate for 某种 understanding。

  3. 例证方向一致性 P4 P5

    说明文作者选择的 examples 不是 neutral 的,而是 strategically selected 来 support 他们的 perspective。如果所有 examples 都 showcase positive functions(improving access, preventing interference),这 indicates 作者想让 readers appreciate 这个 phenomenon。

  4. 研究趋势认可 P7

    当说明文作者 describe a shift in research direction 并用 'importance' 和 'appreciated' 这类词,他们在 endorsing 这个 new direction。这不只是 reporting facts,而是 celebrating a positive development in the field。

  5. 功能性总结定性 P9

    说明文的 conclusion 通常 crystallizes 作者的 overall stance。如果结尾用 functional explanations('brain's way of', 'mechanism to ensure')来 describe the phenomenon,而且 emphasize its protective or beneficial role,这 confirms 作者的 positive, appreciative attitude。

  6. 说明文的 overall structure 和 cumulative effect 最终 reveal 作者态度。当每个 section 都 contributes to building a positive understanding,而且 no paragraphs present counterarguments or limitations,这 demonstrates 作者的 unambiguous supportive attitude。

文中的态度信号词

  • sophisticated P2

    这个词 elevates the brain's mechanism from simple to complex and impressive,showing 作者 admiration for the biological system。在说明文中,用 'sophisticated' 而非 neutral term like 'different' indicates 作者 positive evaluation of the phenomenon。

    同类词 advanced complex refined intricate elegant

  • clear advantages P4

    这个 phrase 直接 states the positive value,没有任何 hedging or ambiguity。'Clear' 强化了 'advantages',showing 作者认为 benefits 是 undeniable and evident。在说明文中这样 explicit 的 positive language 是 strong attitude marker。

    同类词 obvious benefits significant merits distinct strengths notable upsides definite gains

  • improves P4

    这个 verb 表示 positive change and betterment,说明 forgetting 不只是 neutral process 而是 beneficial action。在说明文中使用 'improves' 来 describe a mechanism 显示作者 view it as having positive function。

    同类词 enhances facilitates optimizes strengthens boosts

  • importance P7

    这个 noun explicitly assigns high value to the research on forgetting,showing 作者认为这个 topic deserves attention and appreciation。搭配 'begins to be more appreciated' 更强化了 positive evaluation。

    同类词 significance value relevance necessity criticality

  • safety mechanism P9

    这个 phrase 将 forgetting characterize as protective and intentional design,not defect。'Safety' 是 strongly positive word,implying the mechanism 保护我们 from harm。这种 purposeful framing 显示作者 positive, appreciative view。

    同类词 protective system defense mechanism safeguard fail-safe buffer system

  • burdensome P8

    这个词 describes the rare condition of remembering everything as negative,通过 contrast 进一步 support 作者认为 normal forgetting is beneficial 的 stance。说明文中使用 negative term for the opposite condition 间接 reinforces 对主要 phenomenon 的 positive evaluation。

    同类词 overwhelming troublesome problematic challenging difficult

GENRE · 速判体裁

30 秒判定这是一篇说明文

体裁决定读法与出题套路。以下判断步骤与标志词全部以本文为例,可直接迁移到其他英语四级 真题文章。

如何快速判断这是一篇说明文?

  1. 开篇提问式引入 P1

    说明文通常以 explanatory question 开头来引出 topic,比如这里的 'is there a point where it reaches capacity?',这是在探讨 brain capacity 这个 scientific fact。议论文会提出 debatable viewpoint,新闻报道则会直接陈述 recent event 或 who-what-when-where。

  2. 动词语义倾向 P2 P3 P6 P7

    在 第3段 看到 'researchers demonstrated',第2段 是 factual statement 'the answer is no, because...',这些都是在 present information 而不是 persuade readers。议论文会频繁出现 'we should'、'it is essential that'、modal verbs expressing necessity。

  3. 假设性举例说明 P4 P5

    第4段 用 'Imagine, for instance' 引入 bank card PIN 的 example,第5段 用 'Consider trying to remember' 引入 car park 的 scenario。这些 examples 的 function 是 clarify the concept of forgetting,而不是作为 evidence 来 support an argument。议论文的 examples 是 supporting evidence,新闻的 examples 是 factual cases being reported。

  4. 文章从 general question about brain capacity (第1段) → answer with explanation (第2段) → scientific evidence (第3段) → practical examples (第4段-5) → underlying mechanism (第6段) → research context (第7段) → special case (第8段) → conclusion about function (第9段)。这是典型的 expository progression。议论文是 claim → reasons → counter-argument → rebuttal 的 argumentative structure,新闻是 inverted pyramid structure。

  5. 这篇文章完美体现:开篇用 metaphor 和 question 引入 brain capacity 这个 scientific topic (非 controversial issue);全文 verbs 如 demonstrate、shown、incorporate、retrieve 都是 information-presenting verbs;examples 都是 hypothetical scenarios for illustration;structure 是从 question 到 answer 到 mechanism 到 implication 的 linear explanation。四个维度都指向 expository text,而非 argumentative 或 news report。

哪些词暴露了说明文体裁?

  • is P1 说明对象定义解释词 are refers to is defined as means is known as
  • because P2 事物属性功能描述词 since as this is due to the reason is owing to
  • Instead of P2 说明顺序与例证词 instead of rather than as opposed to in contrast to unlike
  • for instance P4 说明顺序与例证词 for example such as e.g. to illustrate consider
  • Consider P5 说明顺序与例证词 consider imagine think about picture suppose
  • When P6 事物属性功能描述词 when whenever as soon as once each time
  • automatically P6 事物属性功能描述词 naturally inherently typically generally normally
  • has focused on P7 说明顺序与例证词 previous research has shown studies have found research indicates evidence suggests according to studies
  • In a sense P9 说明对象定义解释词 in a sense in other words that is to say to put it another way essentially
  • may even be P9 事物属性功能描述词 may be might be could be is possibly is likely
SENTENCE INSIGHTS · 句子精讲

5 句真题句逐层精讲

下列真题句各有独立的句子解析页——中文翻译、结构树逐层拆解、成分与时态、考点讲解与真题高频词。点击句子进入完整解析。

FAQ · 常见问题

关于 2017年6月英语四级真题第3套 Part III Section C (2) 的常见问题

2017年6月英语四级真题第3套 Part III Section C (2) 文章的主旨是什么?
大脑没有固定的容量限制。遗忘是一种复杂的机制,它会清除旧信息为新的相关记忆腾出空间,从而改善信息检索并防止干扰。这种自然过程对大脑功能至关重要,而非缺陷。(英文表述:The brain has no fixed capacity limit. Forgetting is a sophisticated mechanism that removes old information to make room for new, relevant memories, improving information retrieval and preventing interference. This natural process is essential for brain function, not a flaw.)
2017年6月英语四级真题第3套 Part III Section C (2) 文章是什么体裁?难度如何?
体裁为说明文,作者立场是积极支持(Positive and appreciative toward forgetting)。CEFR 难度 B2,全文 346 词、9 段;在英语四级全部 511 篇真题文章中,B2 级共 234 篇(占 46%)。
2017年6月英语四级真题第3套 Part III Section C (2) 文章的篇章结构是怎样的?
全文 9 段按说明文骨架分为 9 个意群:第1段——引出话题:大脑容量问题;第2段——核心论点:遗忘的积极机制;第3段——科学证据:研究支持;第4段——具体实例一:银行卡密码;第5段——具体实例二:停车位记忆;第6段——机制解释:记忆的形成与检索;第7段——研究趋势:关注遗忘条件;第8段——反面案例:完美记忆的负担;第9段——总结升华:遗忘的本质意义。
2017年6月英语四级真题第3套 Part III Section C (2) 文章的作者态度是什么?
作者态度是积极支持(Positive and appreciative toward forgetting)。判断路径:识别说明对象 → 开篇问答定调 → 例证方向一致性 → 研究趋势认可 → 功能性总结定性 → 全文信号一致性;文中的态度信号词包括 sophisticated(第2段)、clear advantages(第4段)、improves(第4段)、importance(第7段)、safety mechanism(第9段)、burdensome(第8段)。
2017年6月英语四级真题第3套 Part III Section C (2) 文章中有哪些值得积累的生词?
按文中出现顺序共 5 个:sophisticated(复杂精密的;高级的)、vulnerable(易受伤害的;脆弱的;易受影响的)、incorporate(合并;纳入;整合)、retrieve(检索;取回;恢复)、burdensome(繁重的;难以承担的;累赘的),每个词的词义都可以由文中上下文线索推断得出。

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