无水石膏

例句：

1. 1. Thisbuilding is made of limestone andgypsum.
   这座建筑由石灰石和石膏制成。
2. 2. The plaster was mixedwith water to make it easier to workwith.
   石膏被加水混合，以便更容易使用。
3. 3. Gypsum is a common mineralfound in many parts of the world.
   石膏是一种在世界许多地方常见的矿物。