名词
中文翻译：铁路线
同义词：
['track', 'railway track例句：1. The railway line runs through the city center.（这条铁路线穿过市中心。）']
例句：
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1. The railway line runs through the city center.
这条铁路线穿过市中心。
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2.The train is on the railway line.
火车正在铁轨上行驶。
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3. The railway line was built to connect two cities.
这条铁路线是为了连接两个城市而建造的。