示例
A：You don't say!
B：Okay, it will come out tomorrow.
A：不见得吧！
B：好吧，明天就水落石出了。
A：He is strange today. It seems that he has something bad to be kept from us.
B：You don't say!
A：他今天很奇怪。好像有不好的事瞒着我们。
B：不见得吧。