Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
Nothing much. I'm just taking one day at a time.
没什么。我只是过一天是一天。
Would you mind mailing this letter for me?
你介意寄我的这封信吗？
In fact, Mendoza soon became so successful that Humphries turned against him.
事实上，门多萨不久便名声大振，致使汉弗莱斯与他反目为敌。