There'll be hell to pay when he finds out.

一旦他发现了真相，那麻烦就大了。

《牛津词典》

There would be hell to pay when Ferguson and Tony found out about it.

要是弗格森和托妮发现了这事，那麻烦可就大了。

《柯林斯英汉双解大词典》

If and when prices crash, there will be hell to pay.

万一要是价格暴跌，后果不堪设想。

youdao

But when they got there, there was hell to pay.

然而但凡兵锋所指之处皆是一片生灵涂炭

耶鲁公开课 - 欧洲文明课程节选