Prefractionation
初步分馏
🗣️ 情景例句
Who has torn these pages out of the book?
谁撕掉书上的这几页？
I have forgotten his telephone number.
我忘记了他的电话号码。
If I were you, I wouldn't have bought that vase.
如果我是你，我就不买那花瓶。