Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
I'd like to have your opinion.
我想听听你的意见。
That deep sigh could only express Helen's sadness.
那深深的叹息，不外乎表示出海伦的悲哀。
Even if two of these were flooded, she would still be able to float.
即使有两个舱进水，仍可漂浮的水面上。