Methylmethane
[医] 乙烷
🗣️ 情景例句
But when do they do it?
但是什么时候动手术？
Well, I'm sorry you have to leave so early.
哦，很遗憾，你非得这么早走不可。
What was the population of the world in 1950?
1950年世界人口是多少？