懒笔记
2020年考研英语二真题 Section II Part A (1) Rats can make friends with robot rats and will rescue them when stuck
Postgraduate · 来自 2020年考研英语二真题 · Section II Part A (1) · 阅读理解（四选一）

Rats can make friends with robot rats and will rescue them when stuck

2020年考研英语二真题文章逐层精读

New Scientist《新科学家》2018年11月27日文章 Rats can make friends with robot rats and will rescue them when stuck(老鼠会与机器鼠交朋友,并在后者陷人危难时进行营救)。

本页是 2020年考研英语二真题 Section II Part A (1) 文章的精读视角页——这篇说明文全文 413 词、7 段，CEFR 难度 B2（B2 级在考研英语二文章中占 22%），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，其中能迁移到其他考研英语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

7 段英文原文

以下为2020年考研英语二真题 Section II Part A (1) 的阅读理解（四选一）原文，共 7 段。左侧 P1–P7 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。

Rats can make friends with robot rats and will rescue them when stuck

Rats and other animals need to be highly attuned to social signals from others so they can identify friends to cooperate with and enemies to avoid. To find out if this extends to non-living beings, Laleh Quinn at the University of California, San Diego, and her colleagues tested whether rats can detect social signals from robotic rats.

They housed eight adult rats with two types of robotic rat—one social and one asocial—for four days. The robot rats were quite minimalist, resembling a chunkier version of a computer mouse with wheels to move around and colourful markings.

During the experiment, the social robot rat followed the living rats around, played with the same toys, and opened cage doors to let trapped rats escape. Meanwhile, the asocial robot simply moved forwards and backwards and side to side.

Next, the researchers trapped the robots in cages and gave the rats the opportunity to release them by pressing a lever. Across 18 trials each, the living rats were 52 percent more likely on average to set the social robot free than the asocial one. This suggests that the rats perceived the social robot as a genuine social being, says Quinn. The rats may have bonded more with the social robot because it displayed behaviors like communal exploring and playing. This could lead to the rats better remembering having freed it earlier, and wanting the robot to return the favour when they get trapped, she says.

"Rats have been shown to engage in multiple forms of reciprocal help and cooperation, including what is referred to as direct reciprocity where a rat will help another rat that has previously helped them," says Quinn.

The readiness of the rats to befriend the social robot was surprising given its minimal design. The robot was the same size as a regular rat but resembled a simple plastic box on wheels. "We'd assumed we'd have to give it a moving head and tail, facial features, and put a scent on it to make it smell like a real rat, but that wasn't necessary," says Janet Wiles at the University of Queensland in Australia, who helped with the research.

The finding shows how sensitive rats are to social cues, even when they come from basic robots. Similarly, children tend to treat robots as if they are fellow beings, even when they display only simple social signals. "We humans seem to be fascinated by robots, and it turns out other animals are too," says Wiles.

PARAGRAPHS · 逐段精读

7 段逐段主旨与解读

逐段拆解2020年考研英语二真题 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

    A Research Question: Can Rats Detect Social Signals from Robots?

    Researchers ask whether rats can detect social signals from robotic rats, extending their social attunement to non-living beings.

    该段为全文制造了悬念和方向：说明文的主旨通常是研究结果，而本段只是research question，后续段落会围绕它展开实验过程和发现。理解这一段可以帮助读者把握整篇文章的logic map。

    锁定研究问题
  2. P2

    Experiment Setup: Two Kinds of Robot Rats

    Researchers set up the experiment by housing adult rats with two types of minimalist robots, one social and one asocial, for four days.

    本段是实验的beginning，没有数据或结论，却为最终结论提供了必要前提。理解它有助于建立对实验设计的整体认识，尤其是robot的minimalist属性，这一属性会在后续段落中成为核心讨论点。

    抓实验条件三要素
  3. P3

    Behaviors of the Social vs. Asocial Robots

    The social robot engaged in interactive behaviors like following and playing, while the asocial robot only moved back and forth and side to side.

    本段是实验执行阶段的具体描写，把social和asocial的操作性定义落实。段落的对比结构使读者能预测后续行为测试的结果，为第4段的实验结果做好铺垫。

    归纳行为动词对比
  4. P4

    Key Finding: Rats Preferentially Free the Social Robot

    In releasing robots from cages, rats freed the social robot significantly more often than the asocial one, suggesting they perceived it as a genuine social partner.

    本段是文章中心发现的呈现，直接支撑文章主旨。它证明rats能对robotic social cues作出回应，并更愿意帮助社交型机器人。后面的段5、6、7都是围绕这个发现进行补充说明和拓展。

    数据+解释双线并行
  5. P5

    Reciprocity in Rat Behavior

    Quinn notes that rats are known to engage in reciprocal help and cooperation, including direct reciprocity with previous helpers.

    本段像是研究结果的‘旁证’，让读者理解rat帮助robot背后的behavioral repertoire。它强化了第4段中‘perceived as social being’的可信性，因此对文章主旨起到支持性作用。

    化引语为论据
  6. P6

    Minimal Design Still Triggers Social Response

    Surprisingly, the rats befriended the social robot despite its minimal design, without the need for realistic features like a moving head, face, or scent.

    这段是对研究结论的重要补充：它不是新的实验结果，而是对实验材料意义的挖掘。它强调rats对social cues的敏感度相当高，甚至不必依赖逼真的形态。这让文章主旨中'basic social cues'这个说法更有说服力。

    捕捉讶异转折词
  7. P7

    Broad Implications: Social Cues Across Species

    The findings reveal that rats are highly sensitive to basic social cues from simple robots, and this tendency is shared by children and humans, indicating a broad cross-species fascination with robots.

    本段是文章主旨的最终落脚点：用‘other animals are too’将rat的发现提升到动物乃至人类层面。它不仅回应开头‘social signals’的主题，更让整篇说明文拥有更大的学术价值和吸引力。

    提取总结与类比
SELF CHECK · 段落自检题

7 道逐段细节自检题

针对2020年考研英语二真题这篇原文，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 robotic rats test

    Why did the researchers test rats with robotic rats?

    • A To prove that rats cooperate only with familiar living animals.
    • B To make robotic rats look more like real rats.
    • C To determine whether rats can detect social signals from non-living agents.
    • D To identify the toys preferred by adult rats.
    • E To compare the physical abilities of rats and robots.
    • F To show that children are more interested in robots than rats are.
    显示答案与解析 收起答案与解析

    正确答案：C

    该项完整复现了实验的逻辑缺口：已知 rats 需要回应 social signals，未知的是这种能力是否延伸到 non-living agents。它没有把背景事实误当结论，也没有越过 whether 所保留的不确定性。障碍在于选项用 non-living agents 替换 robotic rats，用 determine whether 概括 to find out if，属于考研常见的同义改写。

    目的句贴标签 时间紧张时，直接用 robotic rats 回扫 第1段，并只读取 test 前后的一个逻辑单元。不要逐项翻译全部选项，而是给每项贴上“研究目的、背景事实、操作细节、文末延伸”标签；只有正确项能进入“研究目的”格。

  2. 第 2 段 定位词 housing arrangement initial

    Which feature best describes the initial housing arrangement?

    • A Eight adult rats were housed separately from both robots for four days.
    • B Two adult rats lived with eight social robots for four days.
    • C Eight adult rats interacted with two identical social robots for eighteen trials.
    • D Eight adult rats lived with one social and one asocial robot for four days.
    • E Adult rats were exposed to robots only after the cage doors were opened.
    • F Eight young rats lived with a single robot that changed its behavior daily.
    显示答案与解析 收起答案与解析

    正确答案：D

    该项准确保留了实验设置的三项边界：eight adult rats、两类 robot 以及 four days。one social and one asocial 是对 two types 的具体化，没有增加额外实验条件。障碍在于题干用 initial housing arrangement 概括 housed，选项则把 two types 展开为两个类别。

    数字名词配对 先在 第2段 进行“数字-名词配对”扫描：不通读修饰语，只锁定数字左右各两个词。再把选项拆成三格核对，即 rats 数量、robot 类别、持续时间；三格完全吻合的正确项即可确定。

  3. 第 3 段 定位词 social robot asocial counterpart

    What set the social robot apart from its asocial counterpart?

    • A It moved only forwards and backwards inside the cage.
    • B It was designed with a realistic head, tail, and scent.
    • C It remained trapped so that living rats could open the cage door.
    • D It avoided the toys used by the living rats.
    • E It joined rats' activities and released trapped rats.
    • F It was smaller and more colourful than the asocial robot.
    显示答案与解析 收起答案与解析

    正确答案：E

    该项提炼了 social robot 的两类关键社会行为：共同参与活动与帮助被困同伴。它既覆盖互动性，也覆盖 helping，正好与 asocial robot 的无目的移动形成对照。障碍在于原文列举三个动作，选项用 joined rats' activities 归纳其中两个，属于概括性同义改写。

    双栏谓语切片 锁定 第3段 后，使用“连接词切片法”：只读 During 后 social robot 的谓语链，以及 Meanwhile 后 asocial robot 的谓语链。然后删除对照组谓语，保留能体现 relation 的谓语，正确项自然显现。

  4. 第 4 段 定位词 greater willingness free the social robot

    What most likely accounted for the rats' greater willingness to free the social robot?

    • A The social robot was physically stronger and could escape without assistance.
    • B The rats had been trained to press the lever for colourful robots.
    • C The asocial robot prevented rats from playing with toys.
    • D The researchers rewarded the rats after each successful release.
    • E The social robot had a more realistic appearance than the asocial one.
    • F The social robot's prior behavior may have fostered bonding and an expectation of reciprocal help.
    显示答案与解析 收起答案与解析

    正确答案：F

    该项忠实保留了推断语气 may，并连接两层解释：communal exploring and playing 促成 bonding，先前获助经历引出 return the favour 的互惠期待。它解释的是为什么社会型机器人更容易被释放，而非重复 52 percent 的表层结果。障碍在于原文的解释分散在数句中，选项将其压缩为 prior behavior、bonding 和 reciprocal help 的因果链。

    推断词后追链 在 第4段 中先跳过 52 percent，直接扫描结果句之后的推断词 suggests、may、could。把这些词后面的名词链压缩为“互动经历-关系判断-回报预期”，再找能覆盖整条链的正确项。

  5. 第 5 段 定位词 direct reciprocity cooperative behavior

    What does direct reciprocity mean in rats' cooperative behavior?

    • A A rat helps another rat that has previously helped it.
    • B A rat helps any trapped rat whenever it sees a cage door.
    • C Two rats receive help from the same robot at the same time.
    • D A rat helps another rat in exchange for food from researchers.
    • E A rat imitates the movements of a social robot.
    • F A rat is helped by a stranger before it helps itself.
    显示答案与解析 收起答案与解析

    正确答案：A

    该项保留 direct reciprocity 的核心结构：当前帮助者面对的是 previously helped it 的对象，既有双方关系，也有先后顺序。previously 是不可删除的限定，决定它是回报式帮助而非一般合作。障碍在于英文代词 it 指代当前施助者，考生若不还原角色，很容易把帮助方向读反。

    AB箭头还原 在 第5段 不必阅读引语前半句，只抓术语后的 where，并把代词替换成 A 和 B：B 帮 A，随后 A 帮 B。选择能完整还原这条双向箭头的正确项。

  6. 第 6 段 定位词 surprised social robot

    What surprised the researchers about the social robot?

    • A It had a moving head and tail that perfectly copied a real rat.
    • B Its minimal, non-lifelike design was sufficient to elicit friendship.
    • C It was much larger than a regular rat but moved more quietly.
    • D It released more trapped rats than the living rats did.
    • E It used colourful markings to identify individual rats.
    • F It caused rats to avoid all other robots in the cage.
    显示答案与解析 收起答案与解析

    正确答案：B

    该项准确概括反差：robot 像 simple plastic box on wheels，研究者原本预期需要 head、tail、facial features 和 scent，但实际这些都 wasn't necessary。sufficient to elicit friendship 对应 rats 的 readiness to befriend。障碍在于正确项不逐项复述设计元素，而以 minimal、non-lifelike 和 sufficient 概括否定式发现。

    but后裁决 进入 第6段 后，直接执行“but 后裁决”：先读 we'd assumed 之后的清单，再用 but that wasn't necessary 一次性划掉这些预期特征。剩下的 minimal design 与 befriend 的搭配，就是判断正确项的最短路径。

  7. 第 7 段 定位词 broader conclusion finding

    What broader conclusion does the finding support?

    • A All animals are naturally fascinated by every kind of robot.
    • B Robots must resemble real animals before children can respond to them socially.
    • C Basic social cues can lead rats and children to treat robots as social beings.
    • D Rats can no longer distinguish living animals from machines.
    • E Children provide stronger evidence than rats for robot cooperation.
    • F Colourful robot designs are the main source of social attraction.
    显示答案与解析 收起答案与解析

    正确答案：C

    该项整合了两层末段信息：rats 对来自 basic robots 的 social cues 很敏感，children 即使面对 only simple social signals 也会把 robots 当作 fellow beings。can lead 保留了适度推断强度，social beings 是对 fellow beings 的准确概括。障碍在于它跨句整合 rats 与 children，并以 basic social cues 替换 simple social signals。

    三钩子抽主旨 在 第7段 只读三个逻辑钩子：finding shows、Similarly、even when。先把它们后的共同名词抽为 social cues，再检查选项是否同时满足“基础线索”和“社会性对待”两项；满足者即为正确项。

STRUCTURE · 篇章结构

6 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. P1

    研究背景与问题提出

    这个意群 introduces the research question，说明 rats 需要 be highly attuned to social signals 来识别 friends 和 enemies，然后提出核心问题：这种 social detection ability 是否 extends to non-living beings 比如 robotic rats

    作为说明文的 opening section，这个意群 establishes the context，解释为什么要研究 rats 和 robots 的互动，为后续的 experimental design 和 findings 搭建 theoretical foundation

    提出实验对象和研究问题
  2. P2 P3

    实验设计与方法

    这个意群 describes the experimental setup，说明研究者 housed eight adult rats 和两种 robotic rats 一起生活 four days，并详细描述了 robots 的 physical characteristics 和两种 robot 的不同 behavioral patterns：一个是 social robot 会 follow living rats、play with toys、open cage doors，另一个 asocial robot 只做 simple movements

    这个意群在说明文中承担 methodology explanation 的功能，通过详细描述 experimental conditions 和 robot designs，让读者理解后续 findings 的 basis，同时 the contrast between social and asocial robots 为验证 rats' sensitivity to social cues 建立了 controlled comparison

    说明实验条件和机器鼠设计
  3. P4

    实验结果与初步解释

    这个意群 presents the key finding：研究者 trapped the robots 然后给 living rats 机会去 release them，结果显示 rats were 52 percent more likely 去救 social robot 而不是 asocial one，Quinn 解释说这 suggests rats perceived the social robot as a genuine social being，可能因为 social robot displayed communal behaviors，rats 形成了 bonding 并期待 reciprocity

    这是说明文的 core findings section，通过 quantitative data（52%）和 researcher's interpretation 直接支撑主旨，证明 rats can detect and respond to social signals from robots，the explanation about bonding and reciprocity 为 the behavioral difference 提供了 causal mechanism

    呈现核心实验数据和因果分析
  4. P5

    理论支撑与补充

    这个意群 provides theoretical backing，Quinn 引用 established research 说明 rats engage in multiple forms of reciprocal help，包括 direct reciprocity 这种现象，where a rat will help another rat that has previously helped them，这为前一意群的 reciprocity explanation 提供了 scientific foundation

    在说明文中这是 supporting evidence section，通过引入 existing literature about rat reciprocity，strengthens the credibility of the interpretation in 意群_3，shows that the observed behavior fits into a broader pattern of rat social cognition

    补充互惠行为的理论证据
  5. P6

    意外发现的讨论

    这个意群 discusses a surprising aspect：尽管 robot 的 design 非常 minimalist，just a simple plastic box on wheels without moving head, tail, facial features or scent，rats 仍然表现出 readiness to befriend it，Wiles 表示他们原本 assumed 需要给 robot 添加更多 realistic features，but that wasn't necessary

    这个意群在说明文中 serves as a discussion section，通过 highlighting the unexpected nature of findings（minimalist design yet effective），amplifies the significance of the discovery，shows that rats' social sensitivity is even more robust than anticipated

    强调机器鼠设计简单性的反差
  6. P7

    研究意义与拓展

    这个意群 broadens the implications，指出 the finding shows how sensitive rats are to social cues even from basic robots，然后 draws a parallel：similarly, children 也会 treat robots as fellow beings when robots display simple social signals，最后 Wiles 总结说不只是 humans，other animals are also fascinated by robots

    作为说明文的 conclusion section，这个意群 generalizes the findings beyond the specific experiment，通过 cross-species comparison（rats and children）shows the broader relevance，fulfills the explanatory purpose by connecting the specific study to universal patterns of social cognition

    概括发现并类比人类行为
MAIN IDEA · 速判主旨

4 步定位这篇文章的主旨

不读完全篇也能锁定主旨——以下 4 步按2020年考研英语二真题 这篇原文的实际行文顺序给出，每步说明看哪里、看出什么，可直接迁移到其他考研英语文章。

  1. 首段定位研究对象与核心问题 P1

    说明文的 first paragraph 通常会 introduce 研究对象和提出 research question,这里明确点出了 rats、social signals 以及要探究的问题——rats 能否 detect signals from robotic rats,这为整篇 article 奠定了 thematic foundation

  2. 实验数据段定位核心发现 P2 P3 P4

    第2段-3 描述了 experimental setup,而 第4段 呈现了 core data(52 percent more likely),这个 quantitative result 直接 support 了 main thesis。说明文的 body paragraphs 会用 concrete evidence 来 validate 研究假设

  3. 结尾段提炼意义升华 P6 P7

    第6段-7 通过 surprising、sensitive to social cues、even when 等 evaluative language 来 emphasize 研究的 significance,并将 findings 扩展到 humans 和 other animals,这种 generalization 强化了 main point 的 universal relevance

  4. 三要素整合提炼主旨 P1 P4 P7

    将 rats(research subject)、can detect social signals from robots(key finding)、sensitive to basic social cues even from non-living entities(broader implication)三个 components 组合起来,就能 construct 完整的 main idea。这种 integration 体现了说明文从 specific observation 到 general principle 的 reasoning pattern

主旨信号词 detect P1 52 percent more likely P4 perceived P4 surprising P6 sensitive to P7 even when P7

MAIN IDEA · 主旨

这篇文章在说什么

研究表明,老鼠能够检测并响应来自简约机器鼠的社交信号,对社交型机器人表现出比非社交型更多的合作行为,揭示了动物对来自非生命体的基本社交线索的敏感性。
Research demonstrates that rats can detect and respond to social signals from minimalist robotic rats, showing increased cooperation with social robots over asocial ones, revealing animals' sensitivity to basic social cues even from non-living entities.
WORD INFERENCE · 生词推断

4 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。已收录进考研英语高频真题词集的单词可点击进入词条页。

  • attuned 对...敏锐感知的；协调一致的

    现在我们将三条线索串联起来。首先，从 第1段 的 sentence structure 看到 need to be highly attuned to social signals 是为了 identify friends and enemies，这个 purposive relationship 告诉我们 attuned 描述的是一种 detection ability。接着，第7段 用 sensitive 来描述同样的现象，这个 synonymous echo 直接点明了 attuned 的核心含义。最后，从 morphology 角度，at- + tune 的组合支持"调整到协调状态"的语义。三条线索共同指向一个结论：attuned 表示"敏锐地感知、协调一致"。

    功能-复现-构词三角验证
  • minimalist 极简主义的；简约的

    让我们整合这些 clues。第2段 通过 appositive description 展示了 robot 的 simple appearance——就像一个 computer mouse with wheels。第6段 用 minimal design 这个 cognate term 进一步阐释，并通过 negative contrast（不需要 moving head, tail, facial features）明确了什么是 minimalist。从 word formation 看，minim + -al + -ist 的结构支持"最小化风格"的含义。三条线索汇聚：minimalist 在 design context 中指"极简的、简约的"。

    实例-变体-对比归纳
  • reciprocal 相互的;互惠的

    现在综合三条线索。第5段 通过 appositive definition 明确告诉我们 reciprocal help 就是 one rat helps another that has previously helped them，这是一个 A→B, B→A 的 sequential exchange。第4段 用 return the favour 这个更 informal 的说法描述同样的 mechanism，strengthening our understanding through familiar language。从 morphology 看，re- prefix 的"向后、回报"含义与这种 mutual exchange 完全吻合。三条线索共同确认：reciprocal 表示"相互的、互惠的"。

    定义-复述-前缀三重解码
  • cue 线索;暗示;信号

    整合这些线索。首先，第1段 的 social signals 和 第7段 的 social cues 形成 synonymous pair，在讨论 rats' sensitivity 时互相替换使用，这直接建立了 semantic equivalence。其次，第7段 的 concessive structure 强调 cues 即使来自 basic robots 也能被 detect，说明 cues 是一种 detectable information。最后，联系 cue 在其他 contexts 中的"提示、信号"含义，我们确认 cues 指的是 environmental signals that prompt responses。结论：cue 在此处表示"线索、暗示、信号"。

    同义追踪-功能分析-多义激活
RHETORIC · 修辞手法

6 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。

  • 举例子

    P2 P3

    文章通过 concrete experimental setup 来 illustrate 老鼠如何 respond to social signals。作者 describe 了 two types of robotic rats 的具体 behaviors：social robot 会 follow living rats、play with toys、open cage doors，而 asocial robot 只是 mechanically move。这些 specific examples 让 abstract concept of social perception 变得 tangible and understandable，帮助 readers visualize 实验过程，从而更好地 understand 研究的 main finding about rats' sensitivity to social cues。

    信号词 for example for instance such as like including to illustrate specifically in particular

    仿写： 在 writing expository texts 时，可以问自己：我的 general claim 需要什么样的 specific scenario 来 demonstrate？比如要 explain AI's impact，不要只说 "AI affects daily life"，而是 describe："AI recommends songs on Spotify, suggests routes on Google Maps, and filters spam in Gmail." 仿写模版：【General statement】+ For example/instance, 【Specific case 1】, 【Specific case 2】, and 【Specific case 3】.

  • 列数字

    P2 P4

    文章使用 quantitative data 来 strengthen 研究的 credibility："eight adult rats"、"two types"、"four days"、"18 trials each"、"52 percent more likely"。这些 precise numbers 让实验 design 和 results 变得 measurable and verifiable。特别是 "52 percent" 这个 statistical finding，它 quantifies 老鼠对 social robot 的 preference，将 subjective observation 转化为 objective evidence，有力地 support 了文章 main thesis about rats detecting social signals。

    信号词 percent average trials days times ratio rate number of approximately exactly

    仿写： 在 present research findings 时，思考：哪些 aspects 可以被 quantified？不要说 "many students"，而是 "67% of students" 或 "142 out of 210 participants"。仿写模版：In 【specific study setup with numbers】, researchers found that 【subject】 was/were 【percentage/number】 more/less likely to 【action】 than 【comparison group】.

  • 作比较

    P3 P4

    文章的 central comparison 是 social robot versus asocial robot 的对比。通过 juxtapose 它们的 behaviors (following/playing vs. mechanical moving) 和 rats' responses (52% more likely to free social robot)，作者 highlight 了 social cues 的 impact。这个 controlled comparison 是整个 experimental design 的 foundation，它 isolates the variable of social behavior，让 readers clearly see 为什么 rats treat the two robots differently，从而 prove rats can detect social signals。

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

    仿写： 在 explain concepts 时问：什么是 meaningful contrast？选择 comparable subjects with one key difference。比如 explain online learning，可以 compare it with traditional classroom："While traditional classrooms require physical presence, online platforms allow access from anywhere." 仿写模版：【Subject A】 + 【characteristic/behavior】, while/whereas 【Subject B】 + 【contrasting characteristic/behavior】. This difference shows/reveals 【insight】.

  • 引资料

    P4 P5 P6 P7

    文章 quote 了 Quinn 和 Wiles 的 direct statements 来 provide expert interpretation。Quinn explains rats' reciprocal behavior pattern，Wiles comments on the surprising minimal design。这些 quotations serve multiple functions：establish authority (引用 actual researchers)，provide insider perspective (研究者的 first-hand insights)，add credibility to interpretations。特别是 Wiles 的 comment about not needing realistic features，它 reveals unexpected findings，增强了 discovery 的 significance。

    信号词 says according to states claims argues notes points out explains suggests as X put it

    仿写： 在 writing 时考虑：哪些 claims 需要 external validation？选择 authoritative sources that directly address your point。Integration pattern：introduce source's credentials，then quote or paraphrase，then explain relevance。仿写模版：According to 【Expert name + credentials】, "【direct quote or paraphrase】," says 【name】. This 【explains how it supports your point】.

  • 作诠释

    P4 P7

    文章多处 elaborate 和 explain underlying meanings。比如 第4段 中，在 present 实验 result 后，Quinn interprets "the rats perceived the social robot as a genuine social being"，然后 further explain 这可能是因为 "communal exploring and playing" 导致 better remembering 和 reciprocity expectation。这种 layer-by-layer explanation 将 surface behavior (pressing lever) connect to deeper mechanisms (social bonding and reciprocity)，帮助 readers understand not just what happened, but why it happened。

    信号词 this suggests this indicates this means this shows in other words that is to say essentially the implication is this could be because

    仿写： 在 present findings 后问：这个 result means what exactly? Why does it matter? 使用 explanatory phrases 来 bridge fact and meaning。比如 present data 后加："This suggests that..." 或 "This could be because..."。仿写模版：【Observable fact/result】. This suggests/indicates that 【interpretation】. 【Further explanation of mechanism or reason】, says/explains 【optional: expert source】.

  • 下定义

    P5

    第5段 中 explicitly define "direct reciprocity"："where a rat will help another rat that has previously helped them"。这个 precise definition clarifies a technical term that's crucial for understanding rats' social behavior。通过 define this concept，文章 establish clear terminology，让 readers grasp 为什么 rats 会 expect robots to reciprocate。这个 definition 也 connects 实验 findings to broader behavioral science concepts。

    信号词 referred to as defined as means is refers to known as called termed where in which

    仿写： 在 introduce technical terms 时问：这个 concept 的 essential characteristics 是什么？用 genus + differentia structure：先说 general category，再说 specific features。仿写模版：【Term】 is/refers to 【general category】 where/in which 【specific defining characteristics】. 或者：【Term】, defined as 【precise meaning】, 【shows how it relates to current topic】.

IMPLIED MEANING · 言外之意

4 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。

  • 机器鼠设计简陋却有效

    P2
    The robot rats were quite minimalist, resembling a chunkier version of a computer mouse with wheels to move around and colourful markings.

    对比类 minimal minimalist simple basic but yet however

    这个 minimalist design 的描述其实在为后文做铺垫 set the stage。作者通过强调 emphasize 机器鼠的简陋 crude appearance——就像加厚版的电脑鼠标 chunky computer mouse,在降低读者预期 lower expectations 之后,第4段和第6段揭示 reveal 老鼠仍然能够识别 identify 社交信号 social signals 并做出合作反应 cooperative response。这种反差 contrast 直接支撑 support 文章主旨 main thesis:动物对社交线索 social cues 的敏感度 sensitivity 之高,甚至基础的 basic 非生命体 non-living entities 也能触发 trigger 社交行为 social behaviors。这个言外之意的价值 value 在于突出 highlight 研究发现的意外性 unexpectedness 和重要性 significance。

  • 研究者原本预期需要更复杂设计

    P6
    We'd assumed we'd have to give it a moving head and tail, facial features, and put a scent on it to make it smell like a real rat, but that wasn't necessary

    转折类 We'd assumed We thought We expected We believed but that wasn't necessary but actually but in fact

    这句话的言外之意 subtext 非常关键 crucial。研究者列举 enumerate 了一系列他们以为必需的 thought necessary 复杂特征 complex features——活动的头尾 moving head and tail、面部特征 facial features、真实气味 real scent,然后用 but that wasn't necessary 全盘否定 completely negate。这传递 conveys 两层深意 two layers of meaning:第一,老鼠的社交识别能力 social recognition ability 比科学家预想的更基础 more fundamental、更本能 more instinctive;第二,社交信号 social signals 的核心要素 core elements 可能不在于形态逼真度 physical realism,而在于行为模式 behavioral patterns。这直接呼应 directly echoes 文章主旨——动物对社交线索的敏感 sensitivity to social cues 甚至超越 transcends 物理形态的限制 physical form limitations,这个发现 finding 对理解动物社交认知 social cognition 具有重要价值 important value。

  • 现象普遍性超越物种界限

    P7
    Similarly, children tend to treat robots as if they are fellow beings, even when they display only simple social signals.

    对比类 Similarly Likewise In the same way Equally Comparably By the same token Just as

    这个 similarly 引出的类比 analogy 是全文的点睛之笔 finishing touch。作者将老鼠对机器鼠的反应 rats' response to robotic rats 与儿童对机器人的态度 children's attitude toward robots 并列 juxtapose,言外之意是:对基本社交信号的敏感 sensitivity to basic social signals 不仅是老鼠的特性 rats' trait,而是跨越物种 transcends species 的生物共性 biological commonality。这大大提升 significantly elevates 了研究的意义 research significance——从一个关于老鼠的实验 experiment about rats 扩展到 extends to 关于社交认知本质 nature of social cognition 的普遍洞察 universal insight。这个言外之意支撑 supports 文章主旨的最后一层 final layer:动物(包括人类 including humans)对社交线索的敏感 sensitivity to social cues 是一种深层的、基础的生物本能 deep-rooted biological instinct,即使面对非生命实体 non-living entities 也会自动激活 automatically activated。

  • 合作行为背后的互惠动机

    P4
    This could lead to the rats better remembering having freed it earlier, and wanting the robot to return the favour when they get trapped

    情态词 This could lead to could may might This suggests possibly probably

    这句话的言外之意在于揭示 reveal 老鼠合作行为 cooperative behavior 背后的认知机制 cognitive mechanism。表面上看 on the surface 是在描述老鼠释放机器鼠 rats releasing robot,但通过 could lead to 引出的推测 speculation 实际上在说:老鼠可能具有 may possess 记忆 memory、期待互惠 expectation of reciprocity 等复杂的社交认知能力 complex social cognitive abilities。这呼应 echoes 第5段提到的直接互惠 direct reciprocity 概念 concept,共同支撑 jointly support 文章主旨的一个重要维度 important dimension——老鼠对社交信号的识别 recognition of social signals 不仅是简单的刺激-反应 stimulus-response,而是涉及 involves 记忆、预期、互惠等高级社交认知 advanced social cognition。这个言外之意的价值 value 在于从行为层面 behavioral level 深入到认知机制层面 cognitive mechanism level,让读者理解老鼠的社交敏感性 social sensitivity 有着复杂的心理基础 complex psychological foundation。

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（ admiring fascination）。下面是按步骤还原的判断过程与文中的态度信号词。

  1. 首尾呼应定位法 P1 P7

    说明文以informing读者为主，作者很少用评价性语言堆砌情绪，但首段的motivation陈述（比如"To find out if..."）和末段的总结句（比如"fascinated by robots"）会悄悄泄露态度的走向。

  2. 数据呈现方式排查法 P2 P3 P4

    客观的数字陈述本身是neutral的，但作者选择强调哪些数据（比如52 percent more likely）以及是否插入however、but这类转折词，会透露出对findings的信任程度。

  3. 引语情感词提炼法 P4 P5 P6 P7

    当作者挑选的quote里出现情感强烈的词，比如surprising、fascinated，说明作者认同并借专家之口放大了这种情绪，这是一种典型的借言传情写法。

  4. 三重证据交叉验证法 P1 P4 P6 P7

    三重证据的triangulation是判断说明文态度最稳妥的方式，能避免只盯着一句话就断章取义。

文中的态度信号词

  • surprising P6

    这个词直接标记出作者对experiment result超出预期的惊讶，说明文里这种surprise往往暗示作者对findings的正面评价，而不是单纯陈述事实。

    同类词 surprisingly unexpected astonishing remarkable

  • wasn't necessary P6

    通过对比原本预期（要加moving head、facial features、scent）和实际的minimal design，突出研究结果超出expectation的简洁高效，体现作者对research elegance的赞赏。

    同类词 didn't need to simply just merely

  • fascinated P7

    作为全文结尾的情感词，fascinated直接点明作者（借Wiles之口）对整个research topic的着迷，是收尾处态度的总summary。

    同类词 intrigued captivated enthralled charmed

  • sensitive P7

    "how sensitive rats are to social cues"这句用sensitive强调animal cognition能力超出常规认知，隐含作者对这一发现significance的肯定态度。

    同类词 attuned responsive perceptive receptive

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，可直接迁移到其他考研英语 真题文章。

如何快速判断这是一篇说明文？

  1. 首段研究目的表述 P1

    第1段 直接呈现了 research purpose（测试老鼠能否 detect social signals from robotic rats），这是典型的 explanatory text 开头。议论文会先抛出 controversial opinion，新闻报道会用 headline-style 的 breaking news 开头。说明文的 opening 是为了 explain 而非 persuade 或 inform breaking events。

  2. 实验流程时序展开 P2 P3 P4

    第2段 描述 experimental setup（housing rats with robots），第3段 详述 procedure（social vs asocial behaviors），第4段 呈现 results（52% more likely），这是标准的 process explanation。议论文是 claim-evidence-reasoning 的 argumentative structure，新闻是 inverted pyramid（最重要信息前置）。

  3. 专家引述阐释功能 P5 P6

    第5段 的 Quinn 和 第6段 的 Wiles 都在 explain research implications（reciprocal help、minimal design effectiveness），语气是 descriptive 和 analytical 的。议论文的 expert quotes 会呈现 contrasting opinions 来 strengthen debate。新闻的 quotes 用于 verify facts 或提供 official statements。

  4. 结尾普遍性推广 P7

    第7段 将 rat behavior 扩展到 children's interaction with robots，用 'similarly' 做 comparative analysis，最后以 'it turns out' 总结 universal pattern。这是 explanatory conclusion，在 contextualize research significance。议论文结尾会 restate thesis 并 urge action，新闻结尾提供 follow-up information 或 future developments。

  5. 三维立体判断法 P1 P2 P3 P4 P5 P6 P7

    本文完整呈现了 rat-robot interaction research 的 what-how-why，每个 paragraph 都在 add layers of understanding 而非 build an argument 或 report breaking news。全文 absence of evaluative language 和 persuasive devices，presence of technical description 和 causal explanation，confirm 其 explanatory nature。

哪些词暴露了说明文体裁？

  • need to be P1 事物属性功能描述词 require must have to it is necessary to essential for
  • to find out if P1 说明顺序与例证词 to determine whether to test whether to investigate to examine to explore
  • tested whether P1 说明顺序与例证词 experimented to see conducted trials to measured observed analyzed
  • were quite minimalist, resembling P2 事物属性功能描述词 resembling is characterized by consists of is composed of features
  • During the experiment P3 说明顺序与例证词 during the experiment in the trial throughout the study in this phase at this stage
  • Next P4 说明顺序与例证词 next then after that following this subsequently
  • This suggests that P4 说明顺序与例证词 this suggests that this indicates that this shows that the results demonstrate the findings reveal
  • says Quinn P4 说明对象定义解释词 says [expert name] according to [researcher] explains [scientist] notes [expert] [researcher] states
  • have been shown to P5 事物属性功能描述词 are known to have been found to are observed to have been demonstrated to research shows that
  • including what is referred to as P5 说明对象定义解释词 what is referred to as known as called termed defined as
  • was surprising given P6 说明顺序与例证词 unexpectedly contrary to expectations remarkably notably interestingly
  • We'd assumed P6 说明顺序与例证词 we'd assumed we expected we anticipated we thought it was believed that
  • The finding shows how P7 说明顺序与例证词 the finding shows how this demonstrates that the results reveal this illustrates the study shows
  • Similarly P7 说明顺序与例证词 similarly likewise in the same way comparably by analogy
  • it turns out P7 说明顺序与例证词 as it happens in fact actually what we find is the reality is
SENTENCE INSIGHTS · 句子精讲

12 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 Rats can make friends with robot rats and will rescue them when stuck 的常见问题

2020年考研英语二真题 Section II Part A (1) 文章 Rats can make friends with robot rats and will rescue them when stuck 的原文出自哪里？
New Scientist《新科学家》2018年11月27日文章 Rats can make friends with robot rats and will rescue them when stuck(老鼠会与机器鼠交朋友,并在后者陷人危难时进行营救)。
2020年考研英语二真题文章 Rats can make friends with robot rats and will rescue them when stuck 的主旨是什么？
研究表明,老鼠能够检测并响应来自简约机器鼠的社交信号,对社交型机器人表现出比非社交型更多的合作行为,揭示了动物对来自非生命体的基本社交线索的敏感性。（英文表述：Research demonstrates that rats can detect and respond to social signals from minimalist robotic rats, showing increased cooperation with social robots over asocial ones, revealing animals' sensitivity to basic social cues even from non-living entities.）
Rats can make friends with robot rats and will rescue them when stuck（2020年考研英语二真题文章）是什么体裁？难度如何？
体裁为说明文，作者立场是积极支持（admiring fascination）。CEFR 难度 B2，全文 413 词、7 段；在考研英语二全部 94 篇真题文章中，B2 级共 21 篇（占 22%）。
2020年考研英语二真题文章 Rats can make friends with robot rats and will rescue them when stuck 的篇章结构是怎样的？
全文 7 段按说明文骨架分为 6 个意群：第1段——研究背景与问题提出；第2段、第3段——实验设计与方法；第4段——实验结果与初步解释；第5段——理论支撑与补充；第6段——意外发现的讨论；第7段——研究意义与拓展。
Rats can make friends with robot rats and will rescue them when stuck 一文的作者态度是什么？
作者态度是积极支持（admiring fascination）。判断路径：首尾呼应定位法 → 数据呈现方式排查法 → 引语情感词提炼法 → 三重证据交叉验证法；文中的态度信号词包括 surprising（第6段）、wasn't necessary（第6段）、fascinated（第7段）、sensitive（第7段）。
2020年考研英语二真题文章 Rats can make friends with robot rats and will rescue them when stuck 中有哪些值得积累的生词？
按文中出现顺序共 4 个：attuned（对...敏锐感知的；协调一致的）、minimalist（极简主义的；简约的）、reciprocal（相互的;互惠的）、cue（线索;暗示;信号），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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