题目内容
Language change involves not only simplicity of grammar but also elaboration of grammar .
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In future American English will continue to exert its influence onver other languages.
The way children acquire a language provide a basic cause for language change.
"Silly" meant "happy" in the past and now it refers to being naive or foolish. This phenomenon is called semantic broadening.
电气绝缘一般都采用（ ）绝缘。
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