When Noah and his family stepped off the ark, they spoke a single language that was passed on to their offspring.

当诺亚和他的家人们走出方舟时，他们所说的唯一一种语言遗传给了他们的后代。

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But the branch of historical linguistics, involves the comparison of several different languages, or the comparison of different stages of a single language.

但历史语言学的一个分支，涉及到几种不同语言的比较，或同一种语言不同阶段的比较。

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The paper’s authors think they are the first to find a similar effect within a single language in one country.

论文的作者们认为他们第一个发现了在单一语言国家内是如此。

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And one reason we know this is because of the demonstrated case studies where a language is created within a single generation.

我们之所以这样认为,是因为有许多的个案研究,都证明了一代人之内是可以创造出语言的

耶鲁公开课 - 心理学导论课程节选

What happens is, in the course of a single generation, they develop their own language.

实际情况是,在一代人的时间里,他们创造出了属于自己的语言

耶鲁公开课 - 心理学导论课程节选

They value a single language for business, he says, even if it is not their own.

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True, native speakers generally regard the seven to 13 mostly mutually unintelligible variants as dialects of a single language.

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Of those that work, some may owe their success to a powerful, binding ideology (as in the United States), backed by laws, history and, sometimes, a single language.

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