名词
中文翻译：铁路运输
同义词：
['traffic', 'transportation', 'locomotive', 'train', 'wagon']
例句：
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1. The railroad is the main mode of transportation in this region.
铁路是该地区的主要交通工具。
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2. The engineer had to repair the locomotive before it could be used again.
工程师不得不修理机车，才能再次使用它。
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3. The train was delayed due to a sudden stoppage of traffic.
由于交通突然中断，火车被延误了。