名词中文翻译
中文翻译：坑洞沙
同义词：
['hole sand', 'pit gravel']
例句：
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1. The old mine was filled with pit sand and rubble.
那个旧矿井里满是坑洞沙和碎石。
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2. The car was stuck in the pit sand, making it difficult to move.
汽车陷在坑洞沙里，很难移动。
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3. The engineer carefully removed the pit sand before starting the excavation.
工程师小心地清除了坑洞沙，然后开始挖掘。