名词
中文翻译：半亮煤
同义词：
['subdued coal', 'dim coal']
例句：
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1.The mine produces a semibright coal that is used in the production of electricity.
该矿生产一种半亮煤，用于电力生产。
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2. The coal mine is located in a region with abundant subdued coal resources.
煤矿位于一个拥有丰富半亮煤资源的地区。
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3. The use of semibright coal has been banned in some countries due to its high carbon content.
由于碳含量高，某些国家已禁止使用半亮煤。