名词
中文翻译：火车头
同义词：
['locomotive', 'engine例句：1. The train was pulled by a powerful pilot locomotive.（这列火车被一台强大的机车牵引。）']
例句：
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1. The train was pulled by a powerful pilot locomotive.
这列火车被一台强大的机车牵引。
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2.The engineer had to replace the faulty pilot locomotive.
工程师不得不更换故障的机车。
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3. The new locomotive is faster and more efficient than its predecessors.
新型机车比它的前身更快、更高效。