Mark Zuckerberg and three friends started Facebook in two thousand four.

VOA: special.2011.01.14

And so for the three years that I was in the residential colleges, my closest friends on the whole were faculty or were .

因此，那三年来,我住在住宿学院中，总体说来，我最好的朋友,都是教员或一些研究生们。

普林斯顿公开课 - 人性课程节选

Later,she began spending three months at a time with friends and relatives so she could attend other area schools.

VOA: special.2010.06.27

The three athletes won the Gold Medal at the two thousand eight Olympics and are good friends.

VOA: special.2010.08.06