名词
中文翻译：火车头牵引器
同义词：
['locomotive', 'engine', "traction motor例句：1. The train's engine is the most important part of the train.（火车的引擎是火车最重要的部分。）"]
例句：
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1. The train's engine is the most important part of the train.
火车的引擎是火车最重要的部分。
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2.The engineer needs to check the engine regularly to ensure its safety.
工程师需要定期检查引擎以确保其安全。
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3. The traction motor is responsible for pulling the train forward.
牵引电机负责推动火车前进。