首页 汉语词典 英英词典
The set of all sets that do not contain themselves as members (a concept used in stating Russell's paradox).
1950s; earliest use found in The Philosophical Review.
英语词典包含464360条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。