He did a lot of work, but it was all in vain in the end.

他做了很多工作，但最终都是徒劳。

I made many attempts, all in vain.

我尝试了多次，都徒劳无功。

All the struggle we thought was all in vain.

我们所做的所有努力都是白费。

The morning sun glowing, I love all in vain;

早上太阳红通通，我的爱情一场空；

He even offered to marry a widowed female relative of the Sultan but all in vain.

他甚至愿意娶一个苏丹的亲戚一个遗孀，但是却仍是徒然。

The teacher shouted at the kids to pipe down but all in vain, none of them stopped talking.

虽然老师拼命让孩子们安静下来，但徒劳无功，大家依然叽叽喳喳说个不停。

So Shih Huang-ti's burning of the books was all in vain, and if you thought he was right, you were mistaken.

所以秦始皇的焚书不管用，如果你认为他是正确的，你就错了。

Whenever my father hurt my mother I use to beg for mercy and also I use to get really scared and cry a lot but all in vain.

每当我爸爸对妈妈施暴的时候，我会去求饶，而且我也会感到很害怕，不停地哭，但是这都没有用。