I wrote this son, my father and I wrote this song, for the acid victims of Kandahar City -- a few young girls who were trying to make their way home from school when they got attacked by acid.

VOA: standard.2010.03.08

But before I do that, I would also like to welcome-- I know that some of you are watching this from home, to the extension school students, it's wonderful to have you here.

但在这之前，我也想对-,我知道你们中的有些人正在家里看这堂课，对进修学校的同学们表示欢迎，很高兴你们能听我的课。

哈佛公开课 - 幸福课课程节选

By living at home,they will spend That's half the typical cost at a four-year state school, and a fraction of a private university's Adding room and food charges and fees at renowned universities can boost the bill as high as $50,000 a year!

VOA: standard.2009.12.14