This extra heat can raise temperatures in cities by about one to three degrees Celsius compared to rural areas.

VOA: special.2010.03.02

That is to say, the three parts of the cities, workers, auxiliaries, guardians, each of them all work together and each by minding their own business, that is doing their own job, out of this a certain kind of peace and harmony will prevail.

也就是说，城市的三个部份，工人，后备军人及守护者，每人都紧密合作,且各司其职，只管他们自己的事，在此以外,特定的和平及和谐将照管一切。

耶鲁公开课 - 政治哲学导论课程节选

Their study considers painting sixty-three percent of rooftops white in one hundred large cities in warm areas around the world.

VOA: special.2009.06.19

In all three of America's biggest cities, murder rates have fallen to their lowest levels since the 1960s.

VOA: special.2009.01.12

The study examined employment records for eight cities in Minnesota for a three-year period through two thousand six.

VOA: special.2009.05.27