1. 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。
2. This paper gives a new proof of continuum's countability which is more strict and di-rectviewing on the basis of the earlier work. 在前期工作的基础上，提出一个实数集（连续统）可数性的一个更严格、更直观的证明。
3. 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。
4. 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。
5. Countability axioms, separability and connectedness are introduced and investigated for a DE Morgan algebra of topology. Thus the scope of a DE Morgan algebra of topology is extended. 本文引入和研究德摩根拓扑代数的可数公理、可分性和连通性，拓宽了原有的结果。
