“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	submerged macrophyte restoration submerged nozzle submerged plant submerged reef submerged zone submergence stress submersible submersible drilling unit submersible motor pump submersible pump submersible vehicle submersion submersive morphism submetacentric chromosome sub-metering submethod submetric submetric topological space submetrizable space submetrizable topological space submicroanalysis submicrogram submicron submicron emulsions submicron particle content of drilling fluid

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。