徒劳的 用英语:

We tried to do this several times, but it was all in vain.

Don't cry in vain.

Don't speak God's name in vain!

The doctors tried to save the dying man but in vain. How can you say that our soldiers died in vain?!

I tried in vain to start a conversation

I WISH but it's all in vain

I feel like i'm trying to learn my husband english in vain

I tried to convince the other board members, but my efforts were in vain, and they outvoted me.

The doctors tried to save the dying man but in vain

We tried to solve the problem, in vain

I cried and cried in vain. Nobody would have heard me anyway as the walls were soundproof.

The family's complaints were in vain.

that wasn't in vain

They tried to persuade her to join the race but in vain. She stuck to her guns and kept saying no.

Let it not be in vain. / Don't be using God's name in vain.