“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	minimum-wage guarantee system minimum wage standard minimum weight spanning tree minimum with a condition minimum with a constraint minimum work minimum workable width mining abrupt environmental affairs emergency preparedness mining accident mining activity concentration area mining and driving equipment mining and metallurgy in ancient China mining and oredressing techniques in ancient China mining and stripping of open pit mining and stripping order of open pit mining area Mining Area of the Great Copper Mountain in Falun mining area survey mining belt conveyor Mining Big Three of Bolivia mining blasting mining boundary mining capital market mining circular economy mining city

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。