名词
中文翻译：脏煤
同义词：
['dirty coal', 'sooty coal']
例句：
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1. The coal mine is locatedin a remote area, making it difficultto access.
煤矿位于偏远地区，难以到达。
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2.The dirty coal has been burned for manyyears, leaving behind a thick layer ofash.
脏煤已经燃烧了多年，留下了厚厚的一层灰烬。
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3. The sooty coal from the factory is used asfuel for heating homes and businesses.
工厂的脏煤被用作供暖家庭和企业燃料。