We have two introductory courses that are supposed to be taken before you get to my course—one in film art, techniques and technical stuff, and another in film history.

在上我的这门课之前，你应该先上两门入门课程——一门是关于电影艺术、方法和专业知识的，另一门是关于电影历史的。

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In medicine, one is faced with a problem which must be thoroughly analyzed before a solution can be found.

在医学上，人们面临一个问题，在找到解决办法之前必须对这个问题进行彻底的分析。

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We'll be selling ours before we come, so if possible, we'd like the apartment to have one for when we arrive.

我们会在来之前卖掉我们的（冰箱），所以如果可能的话，我们希望在到达的时候公寓里能有一个（冰箱）。

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Many of the matches were fixed. The wrestlers knew before the match which one of them would be the winner.

VOA: special.2010.02.21

We can call them triads and we'll be talking about what that is before-- so that's one reason: major versus minor.

我们可以统称为三和弦,我们一会儿会说到,好的,这是一个答案,大和弦和小和弦

耶鲁公开课 - 聆听音乐课程节选

A couple of announcements before we get started: tomorrow there will be a 10 minute quiz in recitation based upon the content of homework one.

在我们开始之前有几点声明：,明天会有一个10分钟的小测验,详细叙述课后作业内容。

麻省理工公开课 - 固态化学导论课程节选

And director of cricket Zakir Khan said an appointment would be made before a one-day series in Glasgow in July.

BBC: Pakistan to interview Aussie trio

"I'm still only 21 but I agree that it won't be too long before I'll be one of the more experienced players - particularly the way gaelic football is going at the moment".

BBC: Coulter answers the critics

Okay, so JMA's newest pre-quake warning system doesn't cover as much ground as SMS alerts, but with only 10 to 20 seconds of available panic time before an earthquake hits, we'd probably be toppling over one another before we could even find our cellphone anyway.

ENGADGET: Japan Meteorological Agency develops earthquake warning system