Methylmethane
[医] 乙烷
🗣️ 情景例句
my mother is running for the school board?
我母亲竞选联合校董会董事吗？
Could you please let us know what discount you can give for an order exceeding 400 sets?
能否告知定货超过400台你方所能给的折扣。
Punctuality is a necessary habit in all public affairs in civilized society.
准时是文明社会中进行一切社交活动时必须养成的习惯。