内容概述
哈佛大学克鲁夫特（Cruft）实验室的物理学家乔治·W·佩尔斯（George W. Pierce）教授研究昆虫鸣声。他的实验室里有一只蝈蝈，不仅学会了"数数"，还改变了自己原本两拍子的鸣叫节奏。实验中，一名能模仿蝈蝈叫声的助手先唱出三拍子的"唧—唧—唧"，蝈蝈便以三拍子回应；接着四拍子、五拍子，蝈蝈都成功模仿。然而当助手继续增加拍数时，这只小昆虫就跟不上了——它开始即兴唱起之前学会的那些节拍。
中文正文
3° 哈佛的蝈蝈
哈佛大学克鲁夫特（Cruft）实验室的物理学家佩尔斯（George W. Pierce）教授研究过昆虫唱歌¹。在佩尔斯博士的实验室里有只小蝈蝈儿，它学会了数数，也改变了自己原来两拍子的节奏。在一次实验中，一个会学蝈蝈儿叫的助手唱起三拍子的歌儿，蝈蝈儿也跟着唱起来。然后助手改唱四拍子，蝈蝈儿也唱四拍子。然后助手又唱五拍子，蝈蝈儿也唱五拍子。可是接下来，小昆虫跟不上了，于是独自去唱刚才学会的歌儿。
¹ 哈佛克鲁夫特（Cruft）实验室是一个老资格的雷达实验室。【老实验室自然庞物多，现在 cruft 已成为流行的名词，代表多余的东西。】
英文正文
3° The Harvard Katydid. The physicist, Professor George W. Pierce, of the Cruft Laboratory at Harvard University, has studied the songs of insects. There was a katydid in Dr. Pierce's laboratory that learned to count and thereby alter its usual two-beat rhythm. During an experiment, a laboratory assistant who could imitate the katydid's shrill "zeep-zeep," made the sound in three beats instead of two. The katydid answered with three beats. The assistant then tried four, and the katydid answered with four. Then the assistant tried five and the katydid answered with five. At the next stage, however, the insect lost count and, on its own, began to improvise on the numbers it had already learned.
英语学习拓展
常用词汇
physicist音标/ˈfɪzɪsɪst/
物理学家。
原文用法："The physicist, Professor George W. Pierce"
thereby音标/ˌðeəˈbaɪ/
从而，以此。
原文用法："learned to count and thereby alter its usual two-beat rhythm"
alter音标/ˈɔːltə(r)/
改变。
原文用法："alter its usual two-beat rhythm"
rhythm音标/ˈrɪðəm/
节奏，韵律。
原文用法："its usual two-beat rhythm"
imitate音标/ˈɪmɪteɪt/
模仿。
原文用法："who could imitate the katydid's shrill 'zeep-zeep'"
shrill音标/ʃrɪl/
尖厉的。
原文用法："the katydid's shrill 'zeep-zeep'"
beat音标/biːt/
（音乐）拍，节拍。
原文用法："made the sound in three beats instead of two"
answer音标/ˈɑːnsə(r)/
回应，应答。
原文用法："The katydid answered with three beats"
improvise音标/ˈɪmprəvaɪz/
即兴创作，临时凑合。
原文用法："began to improvise on the numbers it had already learned"
同义词与近义词
对应核心词汇：alter
对应核心词汇：alter。
辨析：alter 较正式，指部分改变；change 最通用；modify 强调"做适度修改"。
此处三者均可。
对应核心词汇：imitate
对应核心词汇：imitate。
辨析：imitate 正式且常用；mimic 强调"惟妙惟肖的模仿"（尤指动物）；copy 最通俗。
对应核心词汇：shrill
对应核心词汇：shrill。
辨析：shrill 强调尖锐刺耳；piercing 强调穿透力强；high-pitched 是中性描述"音调高"。
对应核心词汇：improvise
对应核心词汇：improvise。
辨析：improvise 最通用；extemporize 较正式（即席演奏/发言）；ad-lib 多用于表演场合。
常用短语与固定搭配
- thereby doing sth：从而做某事，表结果。原文用法："learned to count and thereby alter its usual two-beat rhythm"
- instead of：而不是，代替。原文用法："in three beats instead of two"
- answer with...：用……回应。原文用法："The katydid answered with three beats"
- at the next stage：在下一阶段。原文用法："At the next stage, however, the insect lost count"
- on one's own：独自地，自主地。原文用法："and, on its own, began to improvise"
- improvise on...：在……基础上即兴发挥。原文用法："began to improvise on the numbers it had already learned"
常用句式
- There was ... that ...：叙事引入句型，引出特定对象及其特征。原文例句："There was a katydid in Dr. Pierce's laboratory that learned to count and thereby alter its usual two-beat rhythm."
- During an experiment, ...：典型的科学叙事时间状语，标记实验场景。原文例句："During an experiment, a laboratory assistant who could imitate..."
- At ..., however, ...：转折 + 时间标记，引出关键变化点。原文例句："At the next stage, however, the insect lost count and..."
长难句解析
During an experiment, a laboratory assistant who could imitate the katydid's shrill "zeep-zeep," made the sound in three beats instead of two.
- 主干：a laboratory assistant ... made the sound in three beats instead of two
- 修饰与从句：
- "During an experiment"（时间状语） - "who could imitate the katydid's shrill 'zeep-zeep'"（定语从句，修饰 assistant） - "instead of two"（比较状语，省略了 "of making it in"）
- 逻辑关系：时间背景（During）+ 定语从句（人物能力）+ 核心动作（made）+ 比较（instead of）
At the next stage, however, the insect lost count and, on its own, began to improvise on the numbers it had already learned.
- 主干：the insect lost count and began to improvise ...
- 修饰与从句：
- "At the next stage"（时间状语） - "however"（插入语，表转折） - "on its own"（插入语，方式状语，强调自主性） - "on the numbers it had already learned"（介词 + 定语从句，修饰 improvise 的对象）
- 逻辑关系：转折（however）+ 并列动作（lost count and began to improvise）+ 定语从句嵌套
语言使用特点
- 文体为学术叙事（academic narrative），兼具实验报告的准确性和故事的生动性。
- 使用拟声词 "zeep-zeep" 增强画面感。
- 动词序列形成清晰的递进-转折结构：tried → answered → tried → answered → tried → answered → lost count → began to improvise。
- "on its own" 这一短语赋予蝈蝈某种"主体性"，使科学观察带有一丝幽默感。
迁移练习
- 用 thereby 写一句表示因果关系的句子。
- 用 at the next stage, however 写一个包含转折的段落开头。
- 将以下中文翻译成英文："起初孩子只能模仿两个音节，但经过练习，他逐渐能发出五个音节的声音。不过再往后他就跟不上了。"
- 解释 instead of 和 on one's own 的含义并各造一句。
点击展开参考答案
- He practiced every day and thereby improved his skills significantly.
- At the next stage, however, we encountered a problem that no one had anticipated.
- At first, the child could only imitate two syllables. But after practice, he gradually managed to make sounds of five syllables. At the next stage, however, he couldn't keep up.
- instead of = 而不是。例：We walked instead of taking the bus. / on one's own = 独自地。例：She completed the project on her own.