名词
中文翻译：Unknown
同义词：
['公共汽车、有轨电车、城市轨道交通车辆']
例句：
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1. The subway is a popular mode of transportation in this city.
地铁是这个城市流行的交通工具。
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2. The bus stops at every corner, making it convenient for everyone to get around.
公交车在每个角落都停，方便大家出行。
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3. The tram has become an essential part of the city's public transport system.
有轨电车已成为城市公共交通系统的重要组成部分。