Mesoxyalyurea
四氧嘧啶
🗣️ 情景例句
I would like to send this by registered mail, please.
我想把这封信挂号寄出。
Just listen to me, and you'll be fine.
听我的准没错。
I am sick of always waiting for you!
你，老让我等你，真是烦透了。