rain check

1. PHRASE If you say you will take a rain check on an offer or suggestion, you mean that you do not want to accept it now, but you might accept it at another time. 目前无法接受，但可日后接受的邀请或建议

I was planning to ask you in for a brandy, but if you want to take a rain check, that's fine. 我本想请你来喝杯白兰地，但如果你想改日再来，也行。