名词
中文翻译：煤炭
同义词：
['bituminous coal', 'anthracite coal', 'lignite coal']
例句：
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1. The coal mine is located inthe remote mountain area.
煤矿位于偏远的山区。
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2. Coal is a major source ofenergy for many industrial processes.
煤炭是许多工业过程的主要能源来源。
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3. Thecoal mine has been closeddue to safety concerns.
由于安全问题，煤矿已经关闭。