wittite

例句：

1. 1. The riverbed is littered with small stones and pebbles.
   河床散布着小石头和卵石。
2. 2. She picked up a few pebbles from the beach.
   她从海滩上捡起了几块卵石。
3. 3. The rocks are covered in moss and small stones.
   这些岩石覆盖着苔藓和小石头。