名词
中文翻译：煤炭运输
同义词：
['coal transport', 'coal conveyance', 'coal shipment', 'coal transportation industry']
例句：
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1. The company's main business is coal transportation.
该公司的主要业务是煤炭运输。
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2. Coal transportation is a crucial part of the energy industry.
煤炭运输是能源行业的关键部分。
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3. The coal transportation route has been optimized to reduce emissions.
煤炭运输路线已经优化，以减少排放。