尽力而为

I shall do what I can insofar as I am able.

在力所能及的情况下我将尽力而为。

Though a little roupy and exhausted,I've always tried my best.

有哑，有筋疲力尽。但我已尽力而为。

The country needs enormous help to rebuild its economy, and it’s time to take up the gauntlet and do what we can.

要重建国家的经需要大量的援助，现在我们应当迎接挑战，尽力而为。