Unipolycondensation
单一缩聚作用
🗣️ 情景例句
We're having a small to-do, and I'd really be happy if you come.
我们打算热闹一下，我真心的希望你能赏光。
You'll get hurt, if you don't watch out.
你不注意的话，就会受伤。
He doesn't like writing letters, but he likes receiving them.
他不爱写信，但他却喜欢收到信。