Nsls
abbr. National Science Library System 国家科学图书馆系统; national synchrotron light source 国家同步加速器光源
🗣️ 情景例句
I know the owner very well.
我和老板很熟。
Please think nothing of it.
别挂在心上。
These bags are heavy.
这是些重的盒子。