柯林斯詞典potholing /?p?t?h??l??/ 1. N-UNCOUNT Potholing is the leisure activity of going into underground caves and tunnels. 洞穴探險[英國英語] 返回 potholing劍橋詞典a sport that involves walking and climbing in underground caves 洞穴探索（運動） 同義詞caving 返回 potholing