请输入您要查询的字词:
单词
邮政史
释义
邮政史
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
number of generators
number of handles
number of hydration
number of inbound tourists
number of independence
number of internal stability
number of inversions
number of local moduli
number of monofilaments
number of outbound
number of outbound tourists
number of participants
number of partitions
number of permutations
number of person-days
number of places
number of plate
number of R & D personnel
number of reading days per week
number of reeling with confine raw silk size
number of reorderings
number of repetitions
number of replications
number of rows
number of runs
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。
Copyright © 2000-2023 Sciref.net All Rights Reserved
京ICP备2021023879号
更新时间:2026/4/22 22:07:08