跟朋友约吃饭，朋友突然有事去不了，想跟你另改时间。除了可以说 reschedule，还可以说一个稍微洋气一点的短语。

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take a rain check 改天再约

爽约的人一般借口都特别丰富：

1. I'd love to go have lunch with you, but I might not finish work by then, can I take a rain check?

不想去就直说...

2. I was planning to ask you in for a brandy, but if you want to take a rain check, that's fine.

怎么不早点说请我喝酒呢...