如果你遇上什么难事，给我打电话。

If you get into any dodgy situations, call me.

《牛津词典》

无论什么时间，你到了那儿就给我打电话。

Call me when you get there, no matter what the time is.

《牛津词典》

你如果还有什么工作方面的问题就给我打电话。

Call me if you have any problems regarding your work.

《牛津词典》

There may be some inefficiencies, and at some point, if you catch me in the hallway, I can give you a sermon on what goes on inside that reactor.

可能会有某些损耗，如果你能在过道上遇到我的话，我会给你详细讲讲,里面到底发生了什么。

麻省理工公开课 - 固态化学导论课程节选

You've got to decide, all right? This is, you can talk to your neighbors, you know do a little bit of thinking. And I'm going to give you ten seconds to figure this out, what your vote is for that.

你们不能弃权，你们必须选择，好吗？,你可以和你附近的同学讨论,简单思考一下，我给你们十秒钟想想，你选择什么。

麻省理工公开课 - 热力学与动力学课程节选

So technically, if you ask what does the velocity stand for-- Let me draw a general situation.

从学术角度来说,如果你问速度表示什么,那让我来给你画一个常见的场景

耶鲁公开课 - 基础物理课程节选