长满地衣的

例句：

1. 1. The forest floor is covered in a thick layer of mosses and lichens.
   森林的地面覆盖着厚厚的一层苔藓和地衣。
2. 2. Lichens are fascinating organisms that can survive in extreme conditions.
   地衣是令人着迷的生物，能在极端条件下生存。
3. 3. In the alpine regions, lichens are an important source of food for some species of animals.
   在高山地区，地衣是某些动物的重要食物来源。