汉语结构中普遍存在着对称规律，它分布于各级语言结构单位之中。

The popular words must have symmetrical characteristic of the structure of Chinese as a sub-structure of Chinese.

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单词是语言结构的基本单位。

Single words are the building blocks of language.

《牛津词典》

语法场对语言单位的结构的制约，包括制约其中语法形式的语法意义。

Restriction of grammatical field on the structure of the spoken language unit involves the grammatical meaning of grammatical form.

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