名词
中文翻译：贫矿
同义词：
['poor rock', 'poor stone例句：1. The mine is producing poor ore due to the lack of proper maintenance.（由于缺乏适当的维护，矿井正在生产贫矿。）']
例句：
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1. The mine is producing poor ore due to the lack of proper maintenance.
由于缺乏适当的维护，矿井正在生产贫矿。
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2. The company has been struggling with poor ore quality in recent years.
该公司近年来一直在努力解决贫矿质量的问题。
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3. The miners are working hard to improve the quality of their poor ore.
矿工们正努力提高他们贫矿的质量。