无济于事

He poured in every ounce of power but couldn't make it.

竭尽了全力却济于事。

It’s no use just wringing our hands—we must do something.

光发愁济于事，我们必须采取。

All his efforts avail to nothing.

的切努力都济于事。

Nothing will help.

切均济于事。

The habitants tried to fight against being moved to another city, but it was no use.

居民们试图抵制移居到城市去, 但济于事。