Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
Marilyn, you want coffee or tea? Marilyn
要咖啡还是茶？
The many children of that family used to play together for hours.
那一家的孩子们常常大伙一起玩上几个小时。
How old are you?
你多大了？