Methide
甲基化物
🗣️ 情景例句
I am studying two majors, and it's quite a burden on my time.
我有两门主修课，这占据了我很大一部分时间。
There is no sense in what he says.
他说的话没有道理。
What on earth has happened to trouble you so?
到底发生什么事让您如此发愁？