lavrock

例句：

1. 1.The lavrock wall is a popular tourist attraction.
   岩石墙是一处受欢迎的旅游景点。
2. 2. He used lavrock to build a new house.
   他用岩石建造了一座新房子。
3. 3. The lavrock was so hard that it could not be carved into anything.
   岩石太硬了，无法雕刻成任何形状。