In the winter months, it is falling by about three percent every ten years.

VOA: special.2009.10.27

Well I've been taking this course or I've been part of this course for the last three years so every years 0 at Harvard I've been part of CS50 and it's a really special class or organization to be a part of-- really a family and I think Cansu will talk a little bit about that.

在过去的三年里,我一直在学习这门课程,所以，每年我都是哈佛大学CS50课程中的一分子0,这是一门特别的课程,大家就像一家人,我想Cansu会谈谈这一点。

哈佛公开课 - 计算机科学课程节选

"Military folks move every two years generally, two to three years, and so that turnover and that constant influx of buying houses,buying cars, buying clothes for schools, is just a huge impact to the Enterprise community."

VOA: standard.2010.08.10