2022年12月英语四级真题第2套 Part III Section C (1)

What's really remarkable, though, is where that fish comes from.

转折强调类 What's really remarkable, though What's truly significant, however What's more striking, though What's particularly noteworthy, however The real surprise, though More importantly, however What really matters, though

作者通过 remarkable 这个 evaluative word 配合 though 的 contrastive function，在 imply：fish consumption 的 increase 本身不是最重要的，真正 significant 的是 the source of fish（即 aquaculture vs. wild fishing）。这个 implicature 为整篇文章的 central argument 做 setup，提前 signal 了文章的 focus 会是 aquaculture 的 rise 及其 implications。对 main idea 的作用是：通过这个 subtle shift in emphasis，作者 establish 了 aquaculture 作为文章 thematic core 的地位，而不是简单地 discuss fish consumption statistics。

For the first time in human history, most of our aquatic food now comes from farming rather than fishing.

时间标记强调类 For the first time in human history For the first time ever Never before in history Unprecedented in human history This marks the first time In an unprecedented development This historic shift

通过 placing 这个 shift 在 entire human history 的 timeline 上，作者 implicitly argues 这不是 a minor trend，而是 a fundamental transformation in how humans obtain food。这个 implicature strengthens the article's argument 关于 aquaculture's critical role。对 main idea 的价值是：it establishes urgency and legitimacy——既然这是 such a historic shift，readers should pay attention to its implications for food security and sustainability，这直接 supports 文章后面 discuss aquaculture's importance 的 rationale。

the volume of fish caught in the wild has leveled off since the 1990s.

委婉表达类 has leveled off has plateaued has stagnated has remained flat has stabilized shows no growth has reached a ceiling

Leveled off 表面上是 neutral description，但 in the context of increasing fish consumption（第1段），它 implicitly conveys 一个 critical problem：wild fishing 无法 meet growing demand。这个 implicature creates logical necessity for the article's argument——既然 wild catch 不能 increase，aquaculture becomes essential。对 main idea 的作用是：通过这个 understated 但 significant constraint，作者 build the case for why aquaculture isn't just an option but a necessity for food security，这 directly supports 文章关于 aquaculture's crucial role 的 central thesis。

Back in 1974, only 10% of marine fish stocks had been overfished. Now, more than three-tenths are.

对比数据类 only 10%... Now, more than three-tenths just 5%... today over 40% a mere fraction... now the majority back then barely any... currently most previously only... now more than once just... today nearly from a small percentage to

通过 present 这个 dramatic increase in overfishing（从 10% 到 30%+），作者 implicitly argues wild fishing is unsustainable 并 approaching crisis。这个 statistical contrast 不需要 explicit commentary——the numbers speak for themselves，conveying urgency。对 main idea 的作用是：这组数据 reinforces 为什么 aquaculture shift 是 necessary and positive——既然 wild stocks 正在 deteriorate rapidly，转向 farming 不只是 an option，而是 imperative for sustainability。这 strengthens 文章关于 aquaculture being crucial for food security 的 core argument。

But while catchings at sea have suffered, fish-farming has been growing at a fast rate.

对比转折类 But while... has suffered... has been growing at a fast rate But while... has suffered... has been growing While X declined, Y expanded Whereas X struggled, Y flourished Even as X decreased, Y increased While X faces challenges, Y shows promise As X falters, Y thrives

这个 while contrast implicitly positions aquaculture as the solution to wild fishing's decline。作者不是 directly stating aquaculture is replacing wild catch，而是 letting the parallel trends speak for themselves——当一个 suffers，另一个 grows fast，the implication is clear: transition is happening。对 main idea 的价值是：这个 implicature validates the shift toward aquaculture 作为 not just necessary but already successful，因为 it's growing despite（or because of）wild fishing's problems。这 supports 文章的 central argument that aquaculture is crucial for future food security。

This shift toward aquaculture isn't just good for ensuring salmon on your plate; it's also crucial to ensuring food security and sustainability.

递进强调类 isn't just good for... it's also crucial to not only... but also essential for beyond just... it's critical for more than simply... it's vital to doesn't just... it also plays a key role in not merely... but fundamentally important to goes beyond... it's essential for

通过这个 progressive structure，作者 implicitly argues aquaculture's importance extends far beyond individual consumption——它关系到 global food security 和 environmental sustainability。从个人的 salmon on your plate 到全球的 food security，这个 scope expansion makes the issue more urgent and significant。对 main idea 的作用是：这个 implicature elevates aquaculture from a personal food choice to a strategic necessity for humanity's future，这 directly reinforces 文章的 central thesis about aquaculture being crucial（而不只是 beneficial）for feeding future populations sustainably。

However, aquaculture is no silver bullet.

转折限定类 However... is no silver bullet However... is not a panacea Yet... is not without problems However... comes with challenges Nevertheless... has its drawbacks However... is not a perfect solution Yet... has significant limitations

Silver bullet 这个 metaphor implicitly acknowledges 读者可能从前文形成的 overly optimistic impression——aquaculture seems like the perfect solution。作者通过 this qualifying statement 在 say：yes, it's important, but don't be naive about its problems。这个 implicature adds nuance and credibility to the argument。对 main idea 的作用是：它 prevents the article from being dismissed as one-sided propaganda。By acknowledging aquaculture's challenges（shrimp farming damage），作者 makes the overall argument more persuasive——the shift toward aquaculture is necessary despite problems，不是因为它 perfect。这种 balanced approach strengthens 而不是 weakens the central thesis about aquaculture's crucial role。

Despite these problems, however, shrimp continues to be among the most popular sea foods worldwide.

让步转折类 Despite these problems, however... continues to be In spite of concerns... remains Notwithstanding the issues... still persists Despite the drawbacks... keeps growing Even with these challenges... continues to Regardless of the damage... still thrives Despite warnings... remains popular

这个 concessive structure implicitly criticizes the disconnect between environmental awareness and consumer behavior——即使知道 shrimp farming causes damage，demand 依然 high。这个 implicature adds complexity to the discussion：aquaculture 不只是有 technical challenges，还面临 human behavior 和 market demand 的 reality。对 main idea 的作用是：它 suggests 即使 acknowledge aquaculture's problems，the shift toward farming is irreversible because of market forces and consumer preferences。这 reinforces 文章的 practical realism——aquaculture 是 necessary future despite imperfections，而解决方案是 better management rather than abandonment。这种 nuanced ending makes the article's argument more sophisticated and credible。