山洞窑洞洞穴经常指天然的洞穴岩洞溶洞等也可以指人工开凿的地洞地窖等
Caves, kilns and caves often refer to natural caves, rock caves, karst caves, etc. They can also refer to artificially excavated underground caves, cellars, etc
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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