reindeer lichen

例句：

1. 1. The forest was covered in a thick layer of moss.
   森林里覆盖着厚厚的一层苔藓。
2. 2.Lichens are known for their ability to survive in extreme environments.
   地衣因其在极端环境中的生存能力而闻名。
3. 3.The lichen on the rock wall is a unique species found nowhere else in the world.
   岩石墙上的地衣是一种在世界其他地方找不到的独特物种。