基本解释中紧同根派生 英汉例句HEREDITARILY MESOCOMPACT AND SCATTERED PARTITION 遗传中紧空间与散射分解countable Mesocompact 可数meso紧空间countable base - mesocompact 基-可数中紧mesocompact mapping meso紧映射sequentially mesocompact spaces 序列中紧空间