shell lime

例句：

1. 1. The shell lime is a popular building material in the region.
   贝壳石灰是该地区流行的建筑材料。
2. 2.The shell lime was used to make the walls of the old castle.
   贝壳石灰被用来制作旧城堡的墙壁。
3. 3.The shell lime was used as a natural fire starter.
   贝壳石灰被用作天然的火种。