原声例句
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Next week we're going to talk about genes and genetic engineering, that's Chapter 3.
下周我们会讨论基因和基因工程,就是第三课的内容了
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This week we're going to talk about DNA technology and genetic engineering: this is Chapter 3 of the book.
这星期我们将探讨DNA技术,和基因工程,这是本书第三章的内容
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