relatively countably compact subset 相对可数紧子集

countably compact space 可数紧致空间 ; 列紧空间

locally countably compact space 局部可数紧空间

countably compact sets 可数紧集

fuzzy countably compact 可数fuzzy紧性

countably compact set 可数紧集

countably compact spaces 可数紧空间

weakly countably compact set 弱可数紧