Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
It is. That's why we bought it for you.
是的。这就是我们买给你的原因。
I can't stand it.
我受不了。
This continental slope usually starts at a place somewhere near the 100-fathom mark
一般是从差不多100英寻水深的地方开始的，