“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	Seattle Chinese Garden Seattle Gas Works Park of America Seattle Policewomen Seattle Post-Intelligencer sea turtle sea urchin SEA view seawall at the south bank of Qiantang river seawall in China seawall in north Jiangsu province seawater absorption attenuation measuring instrument seawater ammonia nitrogen measuring instrument sea water chemical resources seawater chemistry seawater circulating cooling technology seawater cooling technology seawater culture technology of crustaceans sea water desalinization sea water desulfurization seawater desulfurization technology seawater direct cooling technology seawater dissolved oxygen measuring instrument sea-water drilling fluid Seawater drowning seawater encroachment

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。