Mesothoriumi
[化] 新钍I; 228Ra
🗣️ 情景例句
I'm behind in my work.
我的工作进度落后了。
It's difficult to make a decision whithout knowing all the facts.
不了解所有事实而做出决定是困难的。
Von Frisch wanted to find out whether the dance told them how far away the feeding place was.
冯·弗里施想弄清舞蹈是否告诉它们离喂食点有多远。