anhydrock

例句：

1. 1. The anhydrock is a rare mineral that can be found in the earth's crust.
   无水石膏是一种稀有矿物，可以在地球的地壳中找到。
2. 2. The anhydrock was used as a building material in ancient times.
   无水石膏在古代被用作建筑材料。
3. 3. The anhydrock has been studied for its potential health benefits.
   无水石膏已被研究用于其潜在的健康益处。