名词
中文翻译：煤坑
同义词：
['mine', 'coal mine']
例句：
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1. The coal mine is located inthe remote mountainous area.
这个煤矿位于偏远的山区。
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2. The miners are workinghard to extract more coal from the pit.
矿工们正在努力从矿井中提取更多的煤炭。
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3. The coal pit has been asource of income for many families.
这个煤矿一直是许多家庭的收入来源。