The different varieties of the language are in a dynamic relationship with each other.
这种语言的不同变体间存在着动态的联系。
In some sense, a language is composed of language varieties.
在某种意义上说，语言是由各种不同的语体所组成。
The different varieties of the language are in a dynamic relationship with each other.
这一章是关于热能转化成动力的。
The different varieties of the language are in a dynamic relationship with each other.
这一章是关于热能转化成动力的。
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