Methylolation
[化] 羟甲基化
🗣️ 情景例句
But it is not polite to ask older people their age.
但问老人的年龄是不礼貌的。
Have you drunk any fruit juice.
你喝过果汁吗？
Not all sounds made by animals serve as language.
动物发出的声音不都是用作语言交际。