fissure lime stone land

例句：

1. 1.The rock is so hard that it has developed many fissures over the years.
   这块岩石非常坚硬，多年来已经形成了许多裂缝。
2. 2. The earthquake caused a large fissure in the ground.
   地震导致地面出现了一个大裂缝。
3. 3. The scientist discovered a new type of mineral that forms fissures when heated.
   科学家发现了一种矿物，加热时会形成裂缝。