Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
I have a book with photos of some homes in that area.
我有一本那个地区房子的照片。
You can't have it both ways.
你不能兼而有之。
And I want some glue.
我还要些胶水。