这个单元有 5 章：原创课文「一个被推翻的假说」、词汇延展（学术/研究词族与习语）、语法延展（复杂从句嵌套：多重关系从句、名词性从句、分词结构叠加）、功能句型（Writing Essay 学术话题 + 口语 Part 4）、CPE 考点与 8 题自测。
学完你能：写出多层嵌套的学术 C2 句子，用 which/that/what 层层包裹；区分 prove/corroborate 的语域。
预计时间：约 1 周半。
衔接说明：你在 FCE 已会单层关系从句，本单元升级为多层嵌套的学术长句。
学术单元 = 研究词族 + 从句嵌套。课文写 narrator 读一篇论文时发现其结论被新证据推翻，词汇按「方法/证据/局限」分组，语法攻克多重从句嵌套。
主题课文 · 当论文被新证据推翻
课文 · A Caveat Overlooked
（可参看本单元语法深化页）课文精讲 · C2 怎么把观点说透
论为什么这段课文是「从句嵌套教材」
简单写法：The study had been cited hundreds of times. It shaped a field. It rested on a narrow sample. The sample could not support the conclusions.
C2 写法（嵌套）：The study, which had been cited hundreds of times and which had shaped an entire field, rested on a sample that was far too narrow to support the conclusions. What the researchers had failed to acknowledge was that the subjects, who were all from one region, could hardly represent the population.
升级点 1 — 多重非限定从句：两个 which 并列修饰 study。
升级点 2 — What 主语从句 + that 表语从句：What...was that...。
升级点 3 — 插入语嵌套：the subjects, who were..., could hardly...——关系从句插在主语与谓语之间。
① shed light on 阐明、揭示
② a wealth of evidence 大量证据
③ draw on 利用、凭借
④ rest on shaky foundations 基础不牢
⑤ on closer inspection 细查之下
词汇延展 · 学术与研究词族
学术研究词族（C2 高频）
| 组 | 核心词 / 搭配 / 习语 | 备注 |
|---|---|---|
| 方法 | empirical, methodology, paradigm, quantitative, qualitative, sample, hypothesis | empirical evidence 实证 |
| 证据 | corroborate, substantiate, demonstrate, imply, contend, posit, robust | corroborate 佐证 |
| 局限 | caveat, drawback, flawed, inconclusive, bias, generalise, overstate | caveat 注意事项 |
| 正式习语 | shed light on, a wealth of, draw on, on closer inspection | Essay 必备 |
| 词族转换 | empirical→empirically; analyse→analysis→analytical; conclude→conclusion→inconclusive | Part 3 直接考 |
① prove vs corroborate：prove = 证明（定论）；corroborate = 佐证（已有证据再加一把力）。学术写作少用 prove。
② data 正式可作复数：The data are compelling（正式学术）。
③ imply vs infer：作者 imply（暗示）；读者 infer（推断）。别反。
④ research 不可数：a piece of research，不是 a research。
语法延展 · 复杂从句嵌套
嵌套结构全表
| 结构 | 含义/用法 | 例句 |
|---|---|---|
| 多重关系从句 | which...which... 并列修饰 | The study, which was cited and which shaped the field, ... |
| What 主语从句 | 句首名词性从句 | What the researchers overlooked was ... |
| that 表语从句 | was that... | The problem was that the sample was narrow. |
| 介词+which | 正式关系从句 | the framework on which it rests |
| 分词短语嵌套 | having done / done by | The data, gathered over ten years, ... |
| 插入关系从句 | 主语与谓语之间 | The subjects, who were all local, ... |
① 嵌套别超过三层：读起来喘不过气就拆句。
② What 从句作主语，谓语用单数：What concerns me is...。
③ 介词+which 别漏介词：the topic on which they agreed（不是 which they agreed）。
考试怎么考：Part 4：They agreed on a topic. → the topic on which they agreed。
情景操练
即学即用
练习1（What 从句）：The thing they forgot was the cost. → ___ they forgot ___ the cost.
练习2（介词+which）：The theory rests on several assumptions. → several assumptions on ___ the theory ___
练习3（嵌套）：合并：The paper was widely cited. It argued X. → The paper, ___, argued X.
练习4（写自己的话）：用 What...was that... 写一句学术 Essay 句。
查看参考答案
- 练习1：What they forgot was the cost.
- 练习2：several assumptions on which the theory rests
- 练习3：The paper, which was widely cited, argued X.
- 练习4（示范）：What the study fails to explain is that the sample was far from representative.
功能句型 · Essay 学术话题 + 口语 Part 4
三套句型模板
A wealth of research has sought to establish whether...
What the evidence suggests, however, is that...
Critics contend that..., while proponents maintain that...
This holds true, provided that...
These findings, it should be noted, are by no means conclusive.
Correlation, as every student knows, is not causation.
Should we trust expert consensus?
History is littered with theories that were once accepted and later discarded.
The burden of proof, surely, lies with those who claim certainty.
场景对话 · 口语 Part 4 讨论「网络时代我们该相信什么权威」
Student A: That is the central dilemma. A wealth of data is available, yet what the evidence actually suggests is often buried under opinion. History is littered with theories once accepted and later discarded.
Student B: Precisely. The burden of proof lies with those who claim certainty. Studies, which are later overturned, should be read with caution.
Student A: So critical thinking matters more than authority?
Student B: Up to a point. We must trust experts, but never uncritically. What the internet rewards, it seems, is confidence rather than rigour.
CPE 考点 · 学术研究主题怎么考 + 自测
考点分布表
| 卷子/部分 | 题型示例 | 应对策略 |
|---|---|---|
| Reading & Use Part 4 | KWT：What...was that / on which | 2 词改写 |
| Reading & Use Part 3 | 词形：empirical→empirically, analyse→analysis | 判断词性 |
| Reading Part 7 | 句子回填：抓指代 this/such 衔接 | 看前一句指什么 |
| Writing Part 1 | Essay：科学结论是否可信 | contend/maintain + 限定 |
| Speaking Part 4 | 权威与真伪抽象讨论 | burden of proof |
本单元自测 · 8 题
学术研究自测
1（What 从句）：They ignored a key flaw. → ___ they ignored ___ a key flaw.
2（介词+which）：The theory relies on several assumptions. → assumptions on ___ the theory ___
3（词形）：The results were not ___. (conclusive)
4（选择）：Later experiments ___ the original claim. A. corroborated B. proved completely C. evidenced
5（嵌套）：The paper, ___ (cite) hundreds of times, argued X.（正确分词）
6（易混）：The author ___ that the data were flawed. (implied / inferred)
7（写作）：用 Critics contend that..., while proponents maintain that... 写一句。
8（口语）：用 a wealth of evidence 说一句关于研究的话。
查看参考答案
- 1：What they ignored was a key flaw
- 2：assumptions on which the theory relies
- 3：inconclusive（not + 形容词）
- 4：A（corroborate 佐证，合学术语境）
- 5：cited（过去分词作后置定语）
- 6：implied（作者暗示）
- 7（示范）：Critics contend that the study is flawed, while proponents maintain that its conclusions hold.
- 8（示范）：There is a wealth of evidence to suggest that sleep improves concentration.
论从嵌套到学术体面
本单元你拿下的：多重关系从句、What 主语从句、介词+which、分词嵌套。
写作提示：学术 Essay 用一两个长嵌套句即可，配短句调节节奏。
现在就做：把课文里 What...was that... 那句拆成三句，体会嵌套的紧凑感。
在线学习资源 · 剑桥官方
本课程课文与练习均为同主题原创仿真题，知识点对齐 C2 官方大纲，不复制真题原文。