be home and dry 平安无事；大功告成

【例句】
As long as we don't have any accident, I think we'll be home and dry by tonight.
只要我们不出任何事故，我想今晚我们就会平安无事了。

I just need one more source for this essay and then I'll be home and dry.
我只需要再为这篇论文找一处引用，然后就能写完了。