“平常信函”的概念、定义、翻译、参考文献-科学参考

单词	平常信函
释义	平常信函 Encyclopedia 工学信函释 ordinary letter平常信函信函的一种常见形式。邮政企业在收寄时不出具收据，处理时不登记，投递时不要求收件人签收，不接受用户查询。简称平信。
随便看	double-quadrant D.C.converting circuit double qualified teacher double quantum dots device double quantum echo correlated spectroscopy double-quantum echo correlated spectroscopy double quasar double radical double radio source double random sampling double rank double ratio double recursion double-red congratulation letter double reflection double refraction double reheat cycle Double Reheat Rankine Cycle double resonance double-resonance double reversal double-ring galaxy double ringing slotter double root double row scaffold doubler stage

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。