英 [ˈreɪn tʃek] 美 [ˈreɪn tʃek]
延期优惠：一种延期提供优惠的保证，特别是一份文件，保证如果所提供的商品或服务不可用（例如已售完），顾客可以在以后享受优惠。
rain check //
习语 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。
a promise that an unaccepted offer will be renewed in the future
a ticket stub entitling the holder to admission to a future event if the scheduled event was cancelled due to rain
延期；约定以后再补邀请；专用免费票
... rain on v. 使大量降下... rain check 延期；约定以后再补邀... light rain 小雨；微雨；丝丝小雨...
）B：Rain check.（改天吧。） 口语：“改天吧！”文章来源头牌英语[专业词汇]...
Rain check 第二次机会 Hot potato 棘手的问题 ..
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。
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。
Maybe I can take a rain check on your invitation.
或许我可以延期接受你的邀请。
Further, I am not nearly as familiar with the Russian economy as I am with the rest of the pack, so I will take a rain check on this.
While his dollars were enjoying the security of the world's safest investment - Treasury bonds have never failed to pay out - most US investors were taking a financial "rain-check" and cancelling their summer vacations.
In the meantime, whether for the Summer of Sport or the Autumn of Constant Rain, holidaymakers in London and elsewhere might want to check out stay.com.
FORBES: Vacation-Based Services: Norway's Stay.com Takes On The Travel Giants