But with half the world's limestone still to be explored, 但世界上仍有一半石灰岩洞尚未被开发
And when sulphuric acid dissolves limestone 硫酸在溶解石灰岩的同时
cutting through literally miles of limestone. 凿穿了差不多数英里的石灰岩
They discovered that Lechuguilla's limestone had actually been eaten away by sulphuric acid, 他们发现龙舌兰洞的石灰岩 实际上是被硫酸侵蚀的
but, unlike all other limestone caves, 但是 和其它石灰岩溶洞不同的是
a mineral that comes from limestone. 一种硫酸钙沉积而来的矿物
Salt water, unlike fresh water, does not erode limestone, 咸水与淡水不同 不会溶解石灰岩
roots of giant tropical trees have pushed their way through cracks in the limestone 大型热带树木的根系 却已穿透石灰岩裂缝
the slow deposition of dissolved limestone. 都是由水溶碳酸钙缓慢沉淀而来
This water is loaded with dissolved limestone 这些水中含有溶解的碳酸钙