"We have not shied away from raising the difficult problems that exist and stand in the way of the people of Africa realizing their potential.

VOA: standard.2009.08.16

In other words, if you look too closely at a picture or if you stand too far away from it you don't see it clearly it's out of focus but if you achieve just the right distance from it, it comes into focus.

换句话说，如果你站得离一幅图画太近,或太远都无法看清它,它在焦距之外,但是如果你站在合适的位置上，焦距就对准了，画就清晰了。

耶鲁公开课 - 文学理论导论课程节选

Stand up. Shout. Shout away.

请起立,大声说出来

耶鲁公开课 - 博弈论课程节选