It may also be referred to as "draining" (when exploring drains) "urban spelunking", "urban caving", or "building hacking".
它同样也被称为“下水
”，“城市
穴险”，“建筑险”等等。
穴
察，对察穴的爱好It may also be referred to as "draining" (when exploring drains) "urban spelunking", "urban caving", or "building hacking".
它同样也被称为“下水”，“城市穴险”，“建筑险”等等。
We found some really interesting caves, but we didn't have the gear to go spelunking.
我们发现
些相当有趣的穴，但我们没有装备去
穴险。
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