对一些人来说，6000种语言似乎是无穷无尽的。

To some, 6,000 may seem like an inexhaustible number of languages.

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我们利用语言能够表达抽象概念，比如幸福和爱情，过去和未来，通过组词造句能够表达无穷无尽的思想。

Language allows us to talk about abstract ideas such as happiness or love, about the past and the future, and to combine words to express an infinite variety of ideas.

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语言表现形式是无穷无尽的。因而对与语言行为的化石证据——即和语法句法有关的基因——的搜寻，足够科学家们忙上几十年了。

Language is nearly endless in its forms. So the search for its behavioral fossils-genes associated with grammar and syntax-should keep scientists busy for decades to come.

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