translation.en: And an abyss like Krubera Voronya, which is in the Caucasus region, actually the deepest cave explored in the world, can go as far as more than 2,000 meters below the surface.
translation.zh: 而像位于高加索地区的库鲁伯亚拉洞穴， 是迄今为止发现的最深的洞穴， 深度超过2000米。