I worked with a simple database (see Listing 1) that included the countries, regions, and cities of the world.

我使用一个简单的数据库(见清单1)，其中包含世界上的国家、地区和城市信息。

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"Climate change is a deeply local issue and poses profound threats to the growing cities of the world," says Romero Lankao.

“气候变化是一个很局部的问题，对世界范围正在成长的城市造成很大的威胁，”Romero Lankao说。

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In Paris and in airports in the major cities of the world, Korean companies in the past nearly monopolized push carts advertising.

在巴黎以及世界主要城市的飞机场，韩国公司曾经几近垄断过手推车广告。

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An American stuck in London, already one of the world's highest priced cities, found that her hotel had doubled its prices.

VOA: special.2010.04.23

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

And,it has been rated one of the most environmentally friendly cities in the world.

VOA: special.2010.02.10

The large cities of the world now offer dozens of cuisines, instead of just a few.

FORBES: Modern Mix

The problem of waste disposal, which torments and troubles the municipalities and administrations of the major cities of the world, will vanish by overnight.

FORBES: Initiative Would Shutter California Nuclear Plants For Decades While Feds Ponder Waste

The challenge of the day is - can the mega-cities of the world emerge with the qualities we seek in the smaller, vital cities of the past?

BBC: Viewpoint: What makes an ideal city?