When you say: " I'll take a rain cheque" ...

当你说：“我会接受雨支票” . . . . . .

I'll take a rain cheque in hanging out, here.

我会在这里闲逛。

When you take a rain cheque, I can't say a week. I can't say: " I'll take a rain cheque for a week."

当你拿雨支票时，我不能说一个星期。我不能说：“我会接受一个星期的雨检。”

I can't go tonight, but let me take a rain cheque" , which means: " I can't do it tonight, but later on I definitely want to get together and we'll do this.

I can't go tonight, but let me take a rain check” ，意思是：“今晚我做不到，但以后我肯定想聚在一起， 我们会做这个。