Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
That's nice. Length. Length?
太好了。身高 ，多高？
I know the boy whose father is a policeman.
我知道那个男孩的父亲是警察。
Of course, New York is the ideal place for such an interesting study, because there is no shortage of tall buildings.
当然，纽约是进行这种有趣的试验的一个理想的地方，因为那里根本不缺乏高楼大厦，有的是高层的窗槛从上往下坠落。