She wondered how long it would be before they showed that they were flowers.

她不知道它们要过多久才会开花。

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Everything was placed exactly where it used to be before she left the laboratory.

在她离开实验室之前，她把每件东西都准确地放在它们原来的位置上。

youdao

HOW long will it be before everyone on Earth has a mobile phone?

地球人都用上电话还需要多久？

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If vaccine supplies are limited, then the committee says two groups of children should be vaccinated before other children.

VOA: special.2009.08.05

That has to do with what kind of human-being you want to be before you die.

而与你在死之前到底想做,一个什么样的人有关。

普林斯顿公开课 - 人性课程节选

Well the power points will be available before, say for this lecture it will be before so that you can use them in class.

幻灯片其实课前就能下载，这样你上课时就能用到。

哈佛公开课 - 幸福课课程节选

We will not sell Toro Rosso during the 2008 season but it will be before 2010.

CNN: F1 changes force Toro Rosso sale

"It was not where we wanted it to be before, " he said of the app.

CNN: Heather Kelly,

Who knows how long it will be before the snowboarders want to try something else?

ECONOMIST: Scotch whisky