白垩硝

例句：

1. 1. The white limestone is used in the construction of buildings.
   这种白色的石灰石用于建筑的建造。
2. 2.The white limestone has a smooth surface and is easy to carve.
   这种白色的石灰石表面光滑，易于雕刻。
3. 3. The white limestone is a popular material for making pottery.
   这种白色的石灰石是制作陶器的一种流行材料。