(VOICE) In June,Harper taught his last class in instrumental music in the school district of Yonkers, a suburb north of New York City.

VOA: standard.2010.08.11

Now I have the ability to say, I've got a new class, I can create instances of a line segment, and it's elements are themselves instances of points. OK?

这就是我们要讲模块化的地方了，现在我可以说，我创建了一个新类，我可以创建线段的实例了,这些实例的元素？

麻省理工公开课 - 计算机科学及编程导论课程节选

What it does for him is allow him to buy his aunt this symbol of a middle-class American domesticity, and he is a happy participant in this new purchase.

这让他能够给阿姨,买这个美国中产阶级家庭生活的象征物，而他也很高兴能这么做。

耶鲁公开课 - 1945年后的美国小说课程节选

There is so much interest in the book that Professor Ruffin says his new class is already at work on a follow-up book that will include creative writing by inmates and various kinds of art work as well.

VOA: standard.2009.10.21

For those of you who are new to the class,welcome A couple of administrative things.

新加入的同学们，欢迎,一些行政上的事情。

麻省理工公开课 - 固态化学导论课程节选