- like these 5-metre cones, frosted with the most delicate crystals.
例如这些5米高的石锥 上面布满了雪霜一样的松脆结晶 - It was Lechuguilla's gypsum crystals
龙舌兰洞的石膏结晶群 - that made scientists question how these caverns were formed.
使科学家们产生了 这个巨洞如何形成的疑问 - 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 - cutting through literally miles of limestone.
凿穿了差不多数英里的石灰岩 - And when sulphuric acid dissolves limestone
硫酸在溶解石灰岩的同时 - it leaves behind gypsum,
也留下了石膏
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
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