At a time when many schools have cut back on their physical education programs, Calvary's weekly hike day is unique.

VOA: standard.2010.06.25

Probably the most that you see every day is that you can't see the profiles of people at other schools.

每天你浏览网页时可能会发现,你无法浏览其他学校学生的信息。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选