symmetric closure对称: symmetry; symmetrical闭包: closure全称闭包: universal closure闭包: [数学] closure◇闭包算子 closure operator; 闭包运算 closure operationkleene闭包: kleene star下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:对称闭包,即可在微信中查询翻译