There is tremendous amounts of hydrogen sulfide coming into this cave from volcanic sources and from the breakdown of evaporite -- minerals below the carbonates in which this cave is formed -- and it is a completely hostile environment for us.
火山以及分解的蒸发石 --一种藏在洞穴主要成分： 碳酸盐之下的矿物 产生大量的硫化氢气体 这使洞穴环境变得对人类极其不利