- They were about to discover some of the most exquisite formations ever seen underground.
因为他们发现了一些 地底世界中最精美的构造 - The walls were covered with the most delicate and fragile crystals.
石壁上布满了光洁美丽的脆弱结晶 - Many of these crystals were made of gypsum,
许多结晶都是由石膏组成 - a mineral that comes from limestone.
一种硫酸钙沉积而来的矿物 - And there was mile after mile of them.
它们绵延不绝 - Water is the creator of most caves,
水是大部分洞穴的建造者 - 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
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