rock sand

例句：

1. 1. The river flows through the rocky terrain, creating a stunning landscape.
   这条河流穿过崎岖的地形，创造出令人惊叹的风景。
2. 2. The rocks are covered in a layer of sand, making them slippery to walk on.
   这些岩石覆盖着一层沙，使得它们滑不留脚。
3. 3. The beach is littered with rocks and sand, making it a popular spot for swimming.
   海滩上散布着岩石和沙粒，使其成为游泳的好去处。