Mesothoriumi
[化] 新钍I; 228Ra
🗣️ 情景例句
Where's my cap and gown?
我的帽子和长袍在哪里？
Speaking of trips,did I ever tell you about the experience I had?
谈论旅行,我曾经把我的经验告诉你了吗？
There isn't any water in the bottle.
瓶子里一点水也没有。