Today,we travel far and wide to learn about some of the rarest languages in the world.

VOA: special.2009.12.02

Not all the technologies that we need to help people To learn better are necessarily available today.

我们今天还不能获得所有我们需要的技术,用来帮助人们更好地学习。

麻省理工公开课 - 媒体、教育、市场课程节选

And what did we learn today about you guys?

我们从你们身上能总结出什么

耶鲁公开课 - 博弈论课程节选