caving
n. 洞穴探险
v. 洞穴探险；屈服；挖空；倒塌（cave 的现在分词）
例句
He had always wanted to go caving.
他过去一直想探索洞穴。
《牛津词典》
We are surrounded by a natural playground just perfect for walking, caving, climbing and cycling.
我们周围有一个天然的游乐场，非常适合步行、探险、攀岩和骑自行车。
Conyoneering is a combination of climbing, caving, backcountry hiking, and rappelling.
攀峡结合了攀爬、凿洞、荒野远足以及攀绳下滑。
