If we had known how to help we would have acted.

假如我们知道如何做是有效地，那么我们就会采取行动。

youdao

If we had known how to help, we would have acted.

如果我们知道要如何应对，我们将立即行动。

youdao

If we had known how to help, we would have acted.

如果我们知道如何去帮，就一定会采取行动。

youdao

We would have acted.

FORBES: Lessons From Egypt For The American People

We do believe we have acted consistent with the War Powers resolution and we do think it would be -- we would welcome the support of Congress in the form of a resolution similar to the one put forward by senators -- the bipartisan resolution put forward by Senators McCain and Kerry and others.

WHITEHOUSE: Press Briefing

But we acted because failure to do so would have led to catastrophe.

WHITEHOUSE: The Recovery Act �C Year One