countable 专八

countable paracompact

可数仿紧的

countable items; countable sins.

可数的条目；可数的罪

The word “person” is a countable noun.

person词可数名词。

By the method of "Every open set in R" is the union of an at most countable collection of disjoint connected open sets", the paper deals with some problems of countability in real analysis.

摘要以“平面上互不相交的若干开集所成之族至多可数”为基点，对一些相关结果给出了全新的直观化证明。