Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
And this gentleman is my grandfather, Malcolm Stewart.
这位绅士是我祖父Malcolm Stewart。
It won't happen again.
下不为例。
Busmen have decided to go on strike next week.
公共汽车司机决定下星期罢工。