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。

youdao

The use of DC electricity is another source of static electric fields, e.g. rail systems using DC, and televisions and computer screens with cathode ray tubes.

使用直流电是产生静电磁场的另一个原因，例如铁路系统使用直流电，电视和计算机屏幕带有阴极放射管。

youdao

While Britain, France and Germany all have passenger rail systems that account for about 6-8 percent of total annual passenger travel miles, Amtrak carries less than 1 percent.

在欧洲，英国、法国和德国的客运铁路系统占乘客年度总旅行长度的6%-8%，而美铁则占了不到1%。

youdao

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.

FORBES: Restrictive Zoning Is Crippling Silicon Valley's Transit Options

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