So, if we kind of think about the numbers we would need, we would actually need a velocity that approached something that's about 10 to the negative 30 meters per second.

所以如果我们稍微想想，我们需要的数值是多少，我们需要一个,大约为10的负30次方米每秒的速度。

麻省理工公开课 - 化学原理课程节选

If there are two people working together, there's about half as much work for each person to do.

如果有两个人一起工作,每个人大约只需要做工作量的一半

耶鲁公开课 - 博弈论课程节选

You just need about a second.

你只需要大约一秒。

耶鲁公开课 - 心理学导论课程节选

What I'm going to talk about today is to continue our discussion about what is Biomedical Engineering and go a little bit further and we'll spend about half the class doing that, and then I want to spend the last half of the class talking about some biological structures that are very important and that you might not be familiar with.

今天我们要继续讨论,有关生物医学工程的话题,并且更深入些,这需要花上大约半节课时间,后半节课会讨论,一些非常重要的生物构造,有些你们可能不是太熟悉

耶鲁公开课 - 生物医学工程探索课程节选