It is hard to achieve if resource-based cities depend on comparative advantage and lack regional competitive advantage.

资源型城市单纯依靠比较优势，缺乏竞争优势，产业转型就难于实现。

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Based on characteristics of resource-based cities, the countermeasures are put forward for reconstruction of regional competitive advantage.

针对我国资源型城市的实际，提出了再造资源型城市区域竞争优势的战略措施和保障措施。

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It is an urgent task for resource-based cities to increase economy, update the industry, exit the resource industry and seek the superseded industry.

如何实现资源型城市经济增长和产业升级，退出原资源型产业，寻求接续产业已迫在眉睫。

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The city, as Aristotle understands, will always exist in a world with other cities or other states, based on different principles that might be hostile to one's own.

城市，如亚里士多德所认为，将永远会,和其它城市或国家同时存在，根于不同的管理原则,可能还会对自己人怀有敌意。

耶鲁公开课 - 政治哲学导论课程节选

Some of the hardest hit workers, the authors noted, were employed in fields like construction that suffered severe downturns during the economic crisis or were based in cities that were disproportionately affected by the housing bust.

FORBES: Want to Recession-Proof Yourself? Join the Creative Class

The December regulations affected millions of microbloggers using the largest weibo companies, Sina, Sohu and Tencent, which are based in those cities.

BBC: China to extend controls over internet microblogs

The app lists possible meeting locations and the carbon emissions required to get there, based on the cities from which participants are travelling.

BBC: How big is your carbon footprint?