fall in plant

例句：

1. 1. The forest is home to many different types of plants and animals.
   森林里有许多不同种类的植物和动物。
2. 2. The scientist planted a new species of plant in the lab.
   科学家在实验室里种植了一种新的植物品种。
3. 3.The fallen leaves are a sign of autumn.
   落叶是秋天的标志。