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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This communication occurs within the message stanza and includes the source and destination XMPP addresses (from and to), the language used, and a message contained within the body of the stanza.

这个通信在消息节中进行，并且包括了源和目标 XMPP 地址（from 和 to）、使用的语言以及节正文中的消息。

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It is common for speakers of English to switch from one or other variant to a use of language more appropriate for work, school or international communication.

对于英语使用者来说，从一种或另一种变化转向更适合工作、学校或是国际交往的语言运用，这种做法很常见。

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