potholing

noun

noun

1. 洞穴探险
   Potholing is the leisure activity of going into underground caves and tunnels.

in AM, use 美国英语用 spelunking

1. Cave exploration, or potholing, as it has come to be known, is a relatively new sport.
   山洞探险，或人们通常称之为洞穴探险，是一项比较新的运动。
2. She's going potholing at the weekend.
   她周末要去参加洞穴探险运动。