?对集合闭包闭合
... 对乘积闭合 closed under product 对集合闭包闭合 closed under set closure 对联集闭合 closed under union ...
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。