单词：potholer
potholer的用法和样例：
例句
- Precautions of this sort are necessary, for it is impossible to foretell the exact nature of the difficulties which will confront the potholer.这种谨慎是必要的，因为洞穴勘探家将要面临的困难的性质， 是不可能预见的。
词汇搭配
- caver探察洞穴的人...
- speleologist洞穴学者
- spelunker爱好探索洞穴的人...
- caver探察洞穴的人...
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