“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	principle of indeterminacy principle of indexing principle of individualization principle of individualized teaching principle of induction principle of inertia principle of infinity principle of insufficient reason principle of intensity modulation measurement principle of invariance principle of invariance of light speed principle of investigation principle of investment diversification principle of knowledge evaluation principle of least action principle of least curvature principle of least effort principle of least entropy production principle of least motion principle of least privilege principle of least reaction principle of legality principle of library management principle of limiting absorption principle of limiting amplitude

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。