名词
中文翻译：旅行中的火车头
同义词：
['train locomotive', 'locomotive']
例句：
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1. The travelling bogie was thefirst to reach the destination.
这个旅行中的火车头是第一个到达目的地的。
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2. Thetrain's locomotive isresponsible for its smooth operation.
火车的机车负责其平稳运行。
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3. The engineer had toreplace the locomotive before itbroke down.
工程师不得不在火车头故障之前更换它。