rock block

例句：

1. 1.The rock block is too heavy to move easily.
   这块岩石太重了，很难移动。
2. 2.The builders used the rock blocks to build the walls of the castle.
   建造者使用这些岩石块来建造城堡的墙壁。
3. 3.The rock block was a natural barrier that protected the area from floods.
   这个岩石块是一个天然的屏障，保护了这个地区免受洪水侵袭。