So exactly how much exercise do you need to do to gain all of these great health effects?

VOA: special.2010.06.08

That's all you need to do.

你只要做一件事。

That's all课堂 - SpeakingMax英语口语达人

All right. What do you do when you've found the bug and you need to fix it?

好了，当你发现错误并修改它们的时候,你该怎么做？记住一个古老的法则？

麻省理工公开课 - 计算机科学及编程导论课程节选

So how many time do you think-- you all have a piece of paper in front you-- how many time do you think you need to roll over the piece of paper ? for the piece of paper to reach the moon?

你们认为需要折多少次-,你们面前都有一张纸-,你们认为需要将纸折叠多少次,才能碰到月亮？

哈佛公开课 - 幸福课课程节选