In the years that have followed, more and more rail systems have been put in, dramatically changing the nature of the city.

在接下来的几年里，越来越多的铁路系统投入使用，从而极大地改变了城市的自然面貌。

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He points out that both Hong Kong and Zurich have managed to make a success of their rail systems, heavy and light respectively, though there are few cities in the world as hilly.

他指出，尽管世界上很少有城市像香港和苏黎世那样多山，但香港和苏黎世都成功地建设了各自的轻铁和重铁系统。

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Eighty billion dollars of that total was to be pumped into the U.S.economy to promote development of renewable energy, urban mass transit, high-speed rail systems and clean energy jobs.

VOA: standard.2010.02.25

Even with the light rail systems, these metro areas are still more friendly to drivers than non-drivers.

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Despite a 1991 European Union directive which set targets for inter-operability between national rail systems, little progress has been made.

ECONOMIST: Face value

In some regions with large concentrations of employment, downtown major rail systems often attract many riders (although virtually all lose lots of money).

FORBES: New Geographer