discostroma

例句：

1. 1. The lichens on the rocks are a beautiful shade of green.
   岩石上的地衣是一片美丽的绿色。
2. 2. Lichens are known for their ability to survive in extreme conditions.
   地衣因其在极端条件下的生存能力而闻名。
3. 3. In the rainforest, lichens provide important nutrients for the ecosystem.
   在雨林中，地衣为生态系统提供了重要的营养物质。