单词	ring with perfect duality
释义
随便看	universal substitution universal substitution formula of trigonometric function universal surface universal time universal time system universal transverse Mercator projection universal Turing machine universal unfolding universal vector bundle universal volume formula universe of Boolean-valued sets universe of constructible sets universe of discourse universe or cosmos UNIX operation system UNIX操作系统 unknotted knot unknown number unlimited covering surface unlimited register machine unordered pair unordered pair unordered pair unoriented cobordism class unramified extension

数学辞典收录了63749条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。