Mesothoriumii
[化] 新钍II; 228Ac
🗣️ 情景例句
No. I really don't know how to go about it.
没有。我真不知道如何填。
We can dispense with that today but not tomorrow.
今天虽然可以把它免除，但是明天可就不行了。
I'm counting the new books.
我在数新书。