If so, it should be possible to find clues about how human language evolved from grunts or gestures by observing the communication of our close primate relatives.

如果属实，那就应该有可能找到从观察模仿我们的灵长类近亲用叫声或手势交流而逐渐进化到人类语言过程的痕迹。

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If so, it should be possible to find clues about how human language evolved from grunts or gestures by observing the communication of our close primate relatives.

果真如此的话，通过观察与我们亲缘关系最近的灵长类动物之间的沟通交流，就可能从中发现某些线索，证明人类语言到底是怎样从咕哝有声或者打手势进化而来的。

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Human paralanguage may represent a continuation of forms of communication that our non-linguistic ancestors already used, or it may be that it has been changed by co-existing with language.

同期声人类可能是一个持续的通信形式，我们非语言的祖先早已习惯，也有可能是，它已改变了共存的语言。

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Body language was the basis for our earliest form of communication when the split-second ability to recognize if a person or situation was benign or dangerous was often a matter of life or death.

FORBES: The Mistakes People Make Reading Your Body Language