Apart from the possibility of being counted, countability also refers to countable meanings or usages as well as count nouns.

可数性除了指被计数的可能性外，还可以指可数语义或用法，以及可数名词。

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For the Number of nouns, countability is the essential property of count nouns, but the singular, dual and plural are the realization of this property.

就名词的数范畴而言，可数性是可数名词的本质属性，单、双、复数形态是可数性的一种外在实现。

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The permutation of the finite set is introduced into the denumerable set as well as the definition of the basic rotation, the rotation and the composition of the countability.

把有限集中的置换推广到可数集上，引入基轮换、轮换及变换的可数次合成等概念的定义。

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