“首日封”的概念、定义、翻译、参考文献-科学参考

单词	首日封
释义	首日封 Encyclopedia 工学集邮品释 first day cover首日封在新邮票发行首日，将该套邮票的全套或单枚贴在特制信封、普通信封或纪念信封的右上角，加盖当日邮政日戳或特制的首日纪念邮戳的信封。
随便看	ethylene-vinyl acetate copolymer (EVA) ethylene-vinyl acetate resin ethylene-vinylacetate rubber ethylene-vinyl alcohol copolymer ethylene wastewater ethyl ether ethylicin ethyl methanesulfonate induced mutation ethylmethyl ketone ethyl orthophos ethyl oxide ethyl parathion ethyl-parathion ethyl silicate ethyl xanthate ethynyl radical etic method etic research strategies Etienne Chevalier with his patron saint St. Stephen Etienne-Louis Boullée Etinne Lamotte etiolation etiological treatment etiologic diagnosis etiology

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。