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。
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。
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%。
Japan, India and China have taken on the material trappings of modernism: skyscrapers, rail systems, telecoms networks, parliaments, judiciaries and, in some cases, ballot boxes.
日本、印度和中国呈现出了现代主义的物质外表：摩天大楼、轨道交通系统、电信网络、议会、司法体系以及(在某些情况下)投票箱。
Excellent road and rail systems connect the four cities.
优良的道路及铁路系统把这四个城市连接了起来。
Where are the new opportunities in signalling for urban rail systems?
城市铁路用信号系统市场上，哪里存有新市场机会？
In the meantime concerns about impacts to buildings and rail systems continue.
在此期间，人们仍将担心下沉对建筑物和铁路系统的影响。
The precast segmental construction technique is widely used in the viaduct structures for both vehicular and light rail systems.
预制节段拼装连续梁桥可广泛应用于高架桥和轻轨等建设项目。
Rail systems in Germany, Austria, Switzerland, Sweden and Norway all use electrical power at low frequency.
德国，奥地利，瑞士，瑞典和挪威的铁路系统都使用低频率电力。
Rail systems in Germany, Austria, Switzerland, Sweden and Norway all use electrical power at low frequency.
德国，奥地利，瑞士，瑞典和挪威的铁路系统都使用低频率电力。
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