Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
I'm unemployed right now, but I'm looking for a job.
我现在失业了， 但我正在找工作。
My brother was discharged from hospital last week.
我兄弟是上周出院的。
I didn't know she could swim. Who taught her?
我不知道她会游泳。谁教她的？