opening of a letter of credit是什么意思

用法例句

A journal published by the China Academy of Engineering Physics has been developing dramatically after its transformation from restricted publishing to open publishing.

中国工程物理研究院主办的一种内部出版的期刊因缺乏活力而停刊,后办的一种期刊改为公开出版后获得了生机。

Analysis and countermeasure on the launching rate of in-class experiments for new textbooks for senior middle schools;

高中新教材随堂实验开出率的调查分析及对策