rock surface

例句：

1. 1.The rocks are covered in moss and lichen.
   这些岩石覆盖着苔藓和地衣。
2. 2. The cliff is a popular spot for rock climbing.
   悬崖是攀岩的热门地点。
3. 3.The rock surface is uneven and can be slippery.
   岩石表面不平且可能滑。