“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	engineering control measures engineering control network engineering coordinate system engineering cost engineering cost audit Engineering Cybernetics engineering cybernetics engineering data management engineering decision auditing engineering deformation mornitorin engineering design agency engineering design audit engineering design for urban rail transit engineering detection instrument engineering digital survey management system engineering digital survey technology engineering document management engineering drawing editing engineering ecology outlook engineering economic analysis engineering economics engineering education accreditation criteria engineering environmental complexity engineering estimation method engineering ethic

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。