她要是准时到这儿那才怪咧！

If she's here on time, I'll eat my hat!

《牛津词典》

他要是不知道才怪呢！

It would be strange if he didn't know.

《新英汉大辞典》

听说彬格莱小姐将要跟她兄弟住在一起，替他料埋家务；她要不是个好邻居，那才怪呢。

Miss Bingley is to live with her brother and keep his house; and I am much mistaken if we shall not find a very charming neighbour in her.

youdao

We may not accept their answers and it's very likely that we do not but their questions are often put with a kind of unrivaled clarity and insight.

我们可能不接受他们的解答,我们可能接受才怪,但他们的问题常隐含一种,无敌的清晰与独到见解。

耶鲁公开课 - 政治哲学导论课程节选