名词
中文翻译：Unknown
同义词：
['trench', 'borehole', 'drilling hole', 'exploration pit']
例句：
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1. The geologist used a diamond drill to create the exploration hole.
地质学家使用钻石钻头创建了勘探孔。
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2. The team spent several days exploring the depths of the exploration hole.
团队花了几天时间探索勘探孔的深处。
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3. The exploration hole revealed new minerals that were previously unknown.
勘探孔揭示了之前未知的新矿物。