名词
中文翻译：底部的矿床
同义词：
['basement mine', 'basement pit']
例句：
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1.The bottom mine was filled with rubble and debris.
底部的矿床被碎石和碎片填满。
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2. The miners had to work in the bottom mine for hours on end.
矿工们不得不在底部的矿里工作数小时。
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3.The exploration team discovered a new bottom mine that could be exploited.
勘探队发现了一个新的底部矿床，可以开采。