Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
I have spent the last five years working specifically in this field.
过去五年我专门在这个领域里工作。
When anger blinds the mind, truth disapears.
怒火中烧瞎心眼，真理在前看不见。
I'm reading a book.
我在读书。