1·As we know, gypsum is soluble in water.
我们知道，石膏是溶于水的。
2·You'll find lots of gypsum deposited at Lechuguilla.
你们会在拉曲吉亚洞穴中发现许多沉积下来的石膏。
3·If there were flowing water in the cave, it would dissolve the gypsum.
如果洞穴里有流动的水，它会溶解石膏。
4·If you rap it with your knuckle, you hear the thwack of gypsum rather than the ring of cold metal.
如果用指关节击之，你能听见石膏的闷响，而非冷冰冰的金属发出的鸣响。
5·Sediment above and below the gypsum layer contained tiny marine fossils, indicating open-ocean conditions.
在石膏层上方和下方的沉积物中含有许多小型海洋生物化石，这表明这里的海洋环境很开放。