And why is the current president, Barack Obama,sometimes compared to the sixteenth president, Abraham Lincoln?

VOA: special.2009.07.24

So this is why you sometimes had Jews getting in trouble with local groups and had violence with Jews in different places.

所以犹太人常常与当地人发生冲突,在各地都发生涉及犹太人的暴力事件。

耶鲁公开课 - 新约课程节选

And this is actually, in general, why it's sometimes difficult to teach or to tell stories because we constantly overestimate how much other people know.

概而论之，这就是为什么有时候我们很难能讲一个故事,因为我们总是认为别人什么都猜到了。

耶鲁公开课 - 心理学导论课程节选

Sometimes we can tell you why and sometimes we just tell you a story that makes sense of it.

FORBES: Does Microsoft Love Nokia? Samsung? Or Does Stuff Just Happen?

The framework on which this is all hung is a historical look at the expansion of surfing from its roots in Hawaii, and exactly how and why it spread to certain sometimes bizarre places, always eliciting passion along the way, like river surfing from dam generated waves in Germany to Cuba, Japan and the Middle East.

FORBES: How Surfing Explains The World?

And sometimes people ask me, why should we help other countries when we've got so much to do here at home?

WHITEHOUSE: Town Hall in Arnold, Missouri