Mr.Obama said that even while hoping for the best, the federal government is prepared for the worst, if the spill from the underwater well continues.

VOA: standard.2010.05.02

There's a lag period where if I was just looking for antibodies nothing happens for a while.

这中间存在一段迟滞期,如果只过一会就进行观察,抗体的数量不会发生变化

耶鲁公开课 - 生物医学工程探索课程节选

And if not, sleep on it, think about it for a while and then keep going.

如果实在写不出来，就睡一觉，第二天再决定。仔细想一想后继续写。

写作课程比较难 - SpeakingMax英语口语达人

These won't be graded, you don't have to turn them in, it's just to give you some extra practice if you want while you're studying for the exam.

这些题目不会记分，你们也不需要交上来，只是如果你需要的话，这可以让你,在准备考试的过程中得到更多的训练。

麻省理工公开课 - 化学原理课程节选

If you set up a company, you don't want to pay a dividend for a while because you need the money and you're reinvesting it in the company and people will understand.

如果开办一家公司的话,短期内你不会想发放股利,因为你需要将收益用来投资,人们会理解这一点

耶鲁公开课 - 金融市场课程节选

And of course even if in many cases, the engine continues to exist for a while, after the destruction of the car, certainly it doesn't follow the engine is immortal that continues to exist forever.

当然，即使在许多情况下，发动机在汽车毁坏后，能继续存在一段时间，但当然不能得出结论说,发动机是不朽的会永远存在下去。

耶鲁公开课 - 死亡课程节选

It's okay to stick around for a while, but if the high point of the story occurs in chapter 2 and then there are another 67 chapters after that, you think, this was not a well-constructed novel.

有一段下跌并没有关系，但是如果故事高潮在第二章出现2,后面还有67章，你会觉得这部小说结构不好。

耶鲁公开课 - 死亡课程节选