Mesothoriumi
[化] 新钍I; 228Ra
🗣️ 情景例句
I'm beginning to see what you mean.
我开始明白你的意思了。
This is the book that I promised to lend you.
这就是我答应借给你的那本书。
Did he telephone again last night?
他昨夜里又打电话了吗？