All the struggle we thought was all in vain.

我们所做的所有努力都是白费。

youdao

She struggle against fatality in vain.

她徒然奋斗反抗宿命。

youdao

Left to their own devices, economists will struggle in vain for a final, self-contained answer to what is, at root, a political question.

FORBES: Supersized Mega-Banks: It's Not The Economy, Stupid (It's The Politics)

They will also struggle, probably in vain, to make the much-abused ceilings on euro members' fiscal deficits more enforceable.

ECONOMIST: The European Union summit

Still open is the question of whether the injunction against Corley, or the fight against DeCSS itself, is not a vain struggle in the face of inevitable change.

CNN: Focus on the DeCSS trial