All our efforts were in vain.

我们的所有努力都付诸东流了。

《牛津词典》

All efforts of mediation by a third party were in vain at all.

第三方所作的从中调解的一切努力均告失败。

《新英汉大辞典》

All efforts to reconcile her with her husband were in vain.

使她与她丈夫和解的一切努力都白费了。

youdao

That signalled something of a collapse with Akmal, Tanvir and Rehman all falling in quick succession and though Butt continued to smash the ball around the park, his efforts were in vain.

BBC: By Jonathan Stevenson