Mesothoriumi
[化] 新钍I; 228Ra
🗣️ 情景例句
Thank you.
谢谢。
The more things a man is ashamed of the more respectable he is.
一个人引以为耻的事情越多，就越可尊敬。
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，