stoniness

例句：

1. 1. The rock is so hard that it can't be carved with a knife.
   这块岩石太硬了，不能用刀雕刻。
2. 2. The old castle is made of stone and has stood for centuries.
   这座古老的城堡由石头建造，已经屹立了几个世纪了。
3. 3. The road is covered in stones, making it difficult to walk on.
   这条路上满是石头，走起来很困难。