“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	structural rigidity for missile/spacecraft structural risk minimization structural rock unit structural rule structural safety design structural safety factor structural search structural section thermal-vibration test structural seismic response control structural seismic tests Structural Semantics structural semantics structural separation structural shield structural shrinkage structural slope-break zone structural sociology structural software system structural stability structural stability and bearing capacity test structural stability for missile/spacecraft structural stability problem structural statics structural static strength structural static test

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