Sterlite

例句：

1. 1. The white limestone is a popular material for building houses.
   白垩是一种受欢迎的建筑材料。
2. 2. The chalk was used as a writing tool in ancient times.
   在古代，石灰被用作书写工具。
3. 3. The limestone formations are visible from the hiking trail.
   从徒步旅行路线上可以看到石灰石的形成。