名词
中文翻译：铝矿
同义词：
['coal', 'bituminous coal', 'anthracite coal']
例句：
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1. The mine produces alum and coal for industrial use.
这个矿井生产铝和煤炭用于工业用途。
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2. Coal is a major source of energy for many countries.
煤炭是许多国家的主要能源来源。
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3. The coal mine was closed due to safety concerns.
由于安全担忧，煤矿被关闭了。