求翻译：In the middle and later periods of the 20th century, the appearance of network communication brought great challenge to the traditional ways of information exchange and caused enormous impacts on all the aspects of social life. Unavoidably, this will affect languages. English is an international language in the common use of Internet. Influenced by the media, changes take place in the expressions of English obviously and are reflected in words, sentences structure, grammar and pragmatics.是什么意思？

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