translation.en: Because a cave landscape, like this deep shaft in Italy, is hidden, the potential of cave exploration -- the geographical dimension -- is poorly understood and unappreciated.
translation.zh: 因为这些巨大的洞穴， 像这个位于意大利的深坑，深埋地下， 而洞穴考察——从地理学方面而言——的潜力 还得不到足够的重视和认可。