“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	drug carrier drug centralized purchasing drug chemical stability testing drug classification analysis drug compatibility testing drug controlled release system drug crime drug crystal form drug delivery drug delivery of antisense oligonucleotide drug delivery systems drug delivery systems of biotechnology drugs drug dependence drug dependence study drug derivatization techniques drug design drug development drug discovery drug disposition in the body analysis drug dissolution drug distribution in tissue drug distributionstudy drug drug interaction drug-drug interaction drug efficacy

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。