dripstone

例句：

1. 1. The river flows through a series of dropstones that have been worn smooth by the water.
   这条河流经一系列被水流磨平的滴石。
2. 2. The ancient ruins are made up of numerous dropstones that have been preserved for centuries.
   古代遗迹由无数保存了数百年的滴石构成。
3. 3. The park features a variety of dropstones that attract visitors from all over the world.
   公园里有多种吸引着来自世界各地的游客的滴石。