“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	cost per mille (CPM)/cost per thousand (CPT) cost per rating point cost per thousand cost price cost-push inflation cost-reimbursement rules cost-risk analysis costs and benefits in vocational education cost-sensitive learning cost sharing contract cost structure cost-tree search costume according costume and prop box of Shanbing Gaoqiang opera of Jiaojiang District costume bionic design costume case Costume Cases of Chinese Peking Opera costume color design costume color matching method costume color matching type costume culture costume design costume design concept costume designer costume design procedure

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。