“postal distribution of newspapers and periodicals”的概念、定义、翻译、参考文献-科学参考

单词	postal distribution of newspapers and periodicals
释义	postal distribution of newspapers and periodicals Encyclopedia 工学邮政服务释 postal distribution of newspapers and periodicals邮政报刊发行邮政企业利用遍布全国的邮政通信网联系用户广泛、传递迅速等特点，将报纸、期刊等出版物，以订阅或零售的方式按期投递或销售给读者的业务。
随便看	closed contour closed convex function closed convex functional closed convex hull closed convex hypersurface closed convex set closed convex surface closed covering closed current closed curve closed-curve problem closed cycle closed cycle engine closed-cycle refrigerator closed differential closed differential field closed differential form closed differential relation closed disk closed domain closed drain system closed-easy-axis closed economy closed ecosystem closed edge sequence

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。