severginite

例句：

1. 1.The construction company uses severginite to make concrete blocks.
   建筑公司使用硬石膏制造混凝土块。
2. 2. Severginite is a natural mineral that can be found in many places around the world.
   硬石膏是一种天然矿物，可以在世界上许多地方找到。
3. 3.The severginite mine is one of the largest in the region, producing significant amounts of the material.
   这个硬石膏矿是该地区最大的之一，生产了大量的这种材料。