在人类历史长河中，手写语言演化了不仅仅一次。

Written language may have evolved more than once in human history.

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语言是人类历史上最伟大的革新。

The greatest innovation in the history of humankind is language.

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纵观人类历史，随着强势种群的语言传播开来，较小文化的语言则走向没落。

Throughout human history, the languages of powerful groups have spread while the languages of smaller cultures have become extinct.

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But through the course of human history, nobody has ever encountered another group of humans that did not have a language.

但在人类历史的进程中,还没有人曾经遇到过,没有语言的人类族群

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