throw in the towel 认输，承认失败

throw in the towel – giving up and admitting defeat

扔毛巾 - 认输，承认失败

例句：

I think we need to accept things as they are and throw in the towel before we lose any more money.

我认为我们应该接受事实，在我们输掉更多钱之前认输。