“letters express item”的概念、定义、翻译、参考文献-科学参考

单词	letters express item
释义	letters express item Encyclopedia 工学快件释 letters express item信件类快件以封套形式缄封的，内件是按照名址递送给特定个人或者单位的信息载体的快件。不包括书籍、报纸、刊物等。
随便看	Dongfengxisha Shuiku Dongfeng Zhen Dongfu City Dong Fureng Dongfushan Dao Donggang Guanqu Donggangling Formation Dongganglingian Stage Donggangou Donggang Qu Donggang Shi Donggao Donggao Qin Score Donggong Shanmai Dong grand song Dongguan Dongguan Exhibition Center Dongguang Xian Dongguan model Dongguan Museum Dongguan palace Dongguan Qingzhen Dasi Dongguan Science and Technology Museum Dongguan Shi Dong Guk Yi Sang Guk Jip

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。