“philately commemorative postmark”的概念、定义、翻译、参考文献-科学参考

单词	philately commemorative postmark
释义	philately commemorative postmark Encyclopedia 工学集邮品释 philately commemorative postmark集邮纪念戳为纪念与集邮目的而刻制使用的专门戳记。包含两类性质完全不同的戳与章：一类是纪念邮戳，一类是纪念印章。
随便看	set pair analysis method set partition set partitioning in hierarchical trees algorithm set-point control set point theory SET protocol set pulse set recursion theory set retarder set ring set rule set span set square set system set table set-theoretic set-theoretic addition set-theoretical set-theoretic antinomy set-theoretic approach set-theoretic characterization set-theoretic definability set-theoretic difference set-theoretic formula set-theoretic image

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。