名词中文翻译1
中文翻译：Unknown
同义词：
['subway system', 'subway rail system', 'subway structure例句：1. The metrorhexis is the main transportation mode for many cities.（地铁系统是许多城市的主交通方式。）2. The subway system in Beijing is one of the most efficient in the world.（北京的地铁系统是世界上最高效的之一。）']
例句：
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1. The metrorhexis is the main transportation mode for many cities.
地铁系统是许多城市的主交通方式。
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2. The subway system in Beijing is one of the most efficient in the world.
北京的地铁系统是世界上最高效的之一。
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3.The subway system has greatly improved the efficiency of urban transportation.
地铁系统大大提高了城市交通的效率。