I know there's nothing I can say to make it any easier.

我知道无论我说什么都于事无补。

youdao

I've already written Fitzgerald and Moy, so there's nothing I can say.

我已经给费茨杰拉德和莫埃写了信，所以在此我没什么可说的了。

youdao

There's nothing much I can say at the moment.

这一刻我没什么要说的。

youdao

There's nothing I can say that can change their opinion.

BBC: Danny Fitzsimons says 'only God' can judge him

And there's nothing else I can say about it.

NPR: Price Too High For Being World's Top Military Force?