名词中文翻译
中文翻译：主干线机车
同义词：
['mainline locomotive', 'mainline locomotive', 'mainline locomotion']
例句：
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1. The main-line locomotive is the most important part of the train.
主干线机车是火车最重要的部分。
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2.Main-line locomotive technology has greatly improved transportation efficiency.
主干线机车技术大大提高了运输效率。
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3. The main-line locomotive was designed to transport heavy goods over long distances.
主干线机车被设计用来在长距离内运输重货。