1、
Cave exploration, or potholing, as it has come to be known, is a relatively new sport.
洞穴勘察—或者洞穴勘探(人们已经熟悉了这个词语)—是一项较新的运动.
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2、
Cave exploration, or potholing, as it has come to be known, is a relatively new sport.
洞穴勘察—或者洞穴勘探(人们已经熟悉了这个词语)—是一项较新的运动.
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