a shot in the dark

An attempt that is not expected to succeed or has very little chance of working.

没有成功的希望或几乎没有成功机会的尝试;瞎蒙;瞎猜

Angela: "That was a tough question. How did you get it right?"

安吉拉：那是个很难得问题，你怎么答对的?

Andy: "I just took a shot in the dark."

安 迪：我只是瞎蒙。

We had nothing to go by. It was a shot in the dark, but it turned out right.

我们是没有根据的，只不过瞎蒙，可是结果却蒙对了。