形容词
中文翻译：煤炭状的
同义词：
['coal-like', 'coaly']
例句：
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1. The coal mine is located in the northern part of the country.
煤矿位于该国北部。
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2. The coal-fired power plant generates electricity using coal as fuel.
燃煤发电厂使用煤炭作为燃料来发电。
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3. The coal seam is thin and difficult to extract.
煤层薄且难以开采。