Although face masks, which have become a common sight in Mexico City, are worn by only a few people on the streets of Juarez,pharmacies say they are doing a brisk business selling them.

VOA: standard.2009.04.30

The power to know is our ability to recognize, by sight, members of the same polis or city.

求知的能力,是我们透过双眼辨别，同一城邦或城市成员的能力。

耶鲁公开课 - 政治哲学导论课程节选