cristula

例句：

1. 1. The riverbed is littered with small cristulas.
   河床上散布着许多小卵石。
2. 2. The beach was covered in small cristulas of various sizes.
   海滩上覆盖着各种大小的小卵石。
3. 3. The rocks were smooth and shiny, reflecting the sunlight like tiny cristulas.
   岩石光滑而闪亮，像无数小卵石一样反射着阳光。