leaf flush

例句：

1. 1. The leaves are turning a beautiful shade of red.
   树叶正在变成美丽的红色。
2. 2.During the autumn season, many trees experience leaf flush.
   在秋季，许多树木经历叶子变红。
3. 3. The park is full of people enjoying the leaf flush.
   公园里挤满了欣赏叶子变红的人们。