Before all this the island was populated by native American Arawaks.

在所有这一切之前，该岛聚居着土著美洲阿拉瓦克人。

《柯林斯英汉双解大词典》

There was additional work to be done before all the troops would be ready.

在全军准备就绪之前还有些事情要做。

《柯林斯英汉双解大词典》

We have to do that before all the runners arrive.

我们必须在所有参赛者到达之前完成。

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The order to attack was given before all the troops were ready.

VOA: special.2009.09.24

All right, a couple of closing points before we leave this, things I would like you to remember.

好了，我们讲完之前再总结一下，我希望你们能记住的要点。

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I would just get all my work done, like the weekend before it was due.

我会在周末之前把所有的工作都做完。

自身时间管理方法 - SpeakingMax英语口语达人

Before all this I had stints at the BBC and as a radio journalist.

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At current trends, it will be years before all the involuntarily unemployed return to work.

CNN: Both parties abandon the jobless

It will take a year or two before all the fossil remains are unearthed.

BBC: News | Sci/Tech | New dinosaur discovered in England