I need to pay off all my debts before I leave the country.

我得在离开该国前偿清所有债务。

《牛津词典》

So before I leave you all to start your tour, I've just got a few tips.

在你们开始游览之前，我还有一些温馨提示。

youdao

Before I leave you, I wish to state that there will be another performance tomorrow night.

在我离开你们之前，我想声明明晚还有一场演出。

youdao

not a feather then he fluttered -- Till I scarcely more than muttered, "Other friends have flown before - On the morrow he will leave me, as my Hopes have flown before."

VOA: special.2010.10.31

But before I leave this, let me just point out that this is a little bit more general than it might appear.

在我讲别的之前,我需要指出,这模型比它看起来更具有普遍性

耶鲁公开课 - 博弈论课程节选

That's another thing I want to emphasize before I leave this subject -- the word, citizen.

在结束这个主题之前,我还有一个事情要强调,即公民这个词

耶鲁公开课 - 古希腊历史简介课程节选

When we're done, before I leave, we're going to sing happy birthday, okay?

WHITEHOUSE: Take Our Daughters and Sons to Work Day 2012

I'm just trying to figure out how I'm going to do everything I have to do today before I leave.

NPR: U.S. Productivity and Economic Forecasts

So here's what I got to know from you before I leave.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event