Iff
[计] 如果仅仅, 当且仅当, \等价\
🗣️ 情景例句
And Do you like sports?.
或“你喜欢运动吗？”
Life is but a span.
人生如朝露。
Most of us fail in our efforts at self-improvement because our schemes are too ambitious and we never have time to carry them out.
我们大多数人想自我完善却遭到失败，这是因为我们的规划过于宏大，而又根本没有时间去实施。