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今天的句子：

Twin studies have historically been some of the most valuable genetic research tools in the world—contributing a century of data to our knowledge of human behavioral, medical, and physical traits. Though all twins, through their similarities and differences, offer insight into the effects of genetics and the environment, twins who were reared apart offer particularly powerful case studies.

思考题：

Twins raised in different environment is especially helpful for research.

句：

Twin studies have historically been some of the most valuable genetic research tools in the world—contributing a century of data to our knowledge of human behavioral, medical, and physical traits.

词汇突破：

1. contribute A to B  为B提供A

2. historically 从历史的角度讲

3. knowledge 了解

4. traits 特征

切分：

1.Twin studies have historically been some of the most valuable genetic research tools in the world—

2. Twin studies contribute a century of data to our knowledge of human behavioral, medical, and physical traits.

参考译文：

从历史的角度讲，对于双胞胎的研究已经是世界上最有价值的基因研究工具。

一个世纪以来，双胞胎的研究为了解人类的行为，医学和生理特征提供了大量数据。

特别提示：

1.把knowledge翻译为了解，一下就通顺了！

2. 把a century of data 翻译为一个世纪以来，提供大量数据。一下通顺了！

翻译技巧就是在不改变语义的情况下让汉语句子通顺！

第二句：

Though all twins, through their similarities and differences, offer insight into the effects of genetics and the environment, twins who were reared apart offer particularly powerful case studies.

词汇突破：

1.similarities and differences 相似与不同

2.A offer insight into B  A提供了对于B的洞察和了解，

3. rear 养育

4. apart 分开

5. the effects of genetics and the environment 基因和环境的作用

6. case studies 案例研究

切分：

1.Though all twins, through their similarities and differences, offer insight into the effects of genetics and the environment,

2. twins who were reared apart offer particularly powerful case studies.

参考译文一：虽然所有的双胞胎，通过他们的相似和差异，提供了对遗传学和环境作用的认识，而被分开抚养大的双胞胎提供了特别有力的研究案例。

参考译文二： 虽然所有的双胞胎，通过他们的相似和差异，使我们认识了遗传学和环境的作用，但是被分开抚养大的双胞胎提供了特别有力的研究案例。

所以思考题：

Twins raised in different environment is especially helpful for research.

Raised= reared

Apart= in different environment

particularly powerful case studies= especially helpful for research

完美的同义替换！所以这个表达是正确的！

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