“postal history”的概念、定义、翻译、参考文献-科学参考

单词	postal history
释义	postal history Encyclopedia 工学〔交通史〕释 postal history邮政史邮政发展的历史。邮政是依赖实物传输网进行书面通信和快速送达小件物品的系统。“邮”指通信方式和组织，“政”指由国家政权进行统治。数千年来，绝大多数邮政系统为政府运行。至今，邮政大力发展，已经具有通政通民通商的特征，也是国民经济运行不可或缺的行业。
随便看	urban planning of Chongqing urban planning of fire control Urban Planning of Macao urban planning of Pyongyang urban planning of Shengyang urban planning of Tianjin urban planning of Versailles urban planning of Wuhan urban planning on disaster resistance and prevention urban planning on flood control urban planning regulations urban planning regulation system Urban Planning Society of China urban plant urban plaza public space design urban politics urban population urban population base of China urban population density urban population distribution in China urban population problems in China urban population projection urban population size in the administration area of city urban population structure urban postal system planning

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。