For example, the next class at the Naval Academy will include eighteen foreign students, four of them female.

VOA: special.2009.06.04

And so what we ended up doing is the last four weeks of class after we had grounded it in the history of the modern university, understood the structure of it, we had the students select topics that they were really interested in.

所以我们最后选择,在最后四周，在我们了解了,现代大学的历史，理解大学的结构之后，我们让学生们选择一些,他们真正感兴趣的话题。

普林斯顿公开课 - 人性课程节选

He finished his four years at West Point as the best student in his class.

VOA: special.2009.05.24

And so you are really good friends with like all the people you're in class with, because you know them since like four years and you have all classes together with them."

VOA: special.2009.11.05

So when you talk to class four, he says,then it is difficult to teach the little kids in class one.

VOA: standard.2010.02.25

"We've been together four years and it's wonderful that we're no longer completely second class citizens.

VOA: standard.2010.03.03

For most of them,everything's rosy. Once dismissed as lowly junior colleges and commuter schools in urban areas where students could walk or take public transit to class, these two-year colleges are attracting tens of thousands of students who would normally enroll in four-year private or state universities.

VOA: standard.2009.12.14