“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	four-valued logic four-valuedness four-vector four-vector norm four vector of current density four-vector of current density four vector of induction current density four-vector of induction current density four vector of Lorentz force density four-vector of Lorentz force density four vector potential four-vector potential four-velocity four-vertex theorem four virtues of Nirvana Four Wangs four waters-precipitation four wave mixing four-wave mixing four-wave-mixing four-way valve Four Weddings and a Funeral four-wire circuit Fouta Djallon Fou Yi

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。