The cultural knowledge introduced should be concise and immediately relevant to the phrases under consideration, and should not overwhelm the language instruction proper.
有关中国文化知识的介绍，要简明，详略得当，与所讲解的字词句要紧密联系，不能喧宾夺主，冲淡了语言教学。
One of the general principles in language use is the Economy principle, which means that fewer words should be used to express more information in order to be concise and succinct.
语言表述的普遍原则之一是经济原则——用尽量少的形式表达尽量多的语义内容，力求简洁精练。
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