“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	linear differential equation of first order linear differential form linear differential game linear differential operator linear differential system linear diffraction theory linear dimension linear diode linear Diophantine equation linear discrete time system linear discriminant analysis linear discriminant analysis, LDA linear discriminant analysis,LDA linear discriminant function linear disjointness linear dispersion linear dispersion code linear dispersion relation linear displacement linear displacement sensor linear displacement transducer linear distance linear distance spaces Linear Distinguishing Cryptanalysis linear distortion

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。