They count down the final seconds to midnight as they watch a brightly lit ball slide down a pole on top of a tall building.

VOA: special.2009.12.28

So, at the very top of the file I'm just copying and pasting what was essentially on the slide a moment ago.

在这个文件的顶端,我只是做了复制和传递。

哈佛公开课 - 计算机科学课程节选