rain check n. (比赛、演出等因雨取消时)可延期使用的票；顺延；补发的票；延期；改日

【例句】
I was planning to ask you in for a brandy, but if you want to take a rain check, that's fine.
我本打算请你到家里喝杯白兰地，但如果你想改天，那也可以。

We'll give you a rain check if you want.
如果您想要，我可以给您一张购物凭证。