动词
中文翻译：挖掘
同义词：
['drill', 'bore', 'tunnel']
例句：
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1.The cavern is filled with stalactites and stalagmites.
洞穴里充满了石笋和石柱。
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2.The miners were able to drill down into the earth's core.
矿工们能够钻入地球的核心。
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3. The cave was so dark that it was difficult to see anything.
洞穴太暗了，什么都看不见。