Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
That's it.
是的。
Excellent.
妙极了。
At the station, he was told by a smiling policeman that his bicycle had been found.
在警察局里，一位面带笑容的警察告诉他，他的自行车找到了。