red leaf

例句：

1. 1.The red leaves on the trees are changing color.
   树上的红叶正在变色。
2. 2. Red leaves are a symbol of autumn.
   红叶是秋天的象征。
3. 3.The park is full of vibrant red leaves during autumn.
   公园里在秋天满是鲜艳的红叶。