Postselection
后选择
🗣️ 情景例句
what you need to fix up the old library.
你们修复旧图书馆所需要的东西。
What were you doing when I called?
我打电话给你时你在干吗？
Sometimes we aren't able to get into every building because there are too many steps.
有时我们并不能进每栋楼房，是因为楼梯太多了。