“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	resting sporangium resting spore resting stage resting state resting-state functional MRI restio family restitution restitution coefficient restitution coefficient, coefficient of restitution restitutive law rest length restless legs syndrome, RLS restlessness rest mass rest mass energy rest of eutectic rest of peritectic restorable flight control restoration restoration and reconstruction plan of Yingxiu Town restoration and strengthening of Prussian serfdom restoration ecology restoration equipment of collection restoration of ancient human corpse and remains） restoration of aquatic ecosystems

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。