forked echo

例句：

1. 1. The sound of the waterfall was a forked echo in the valley.
   瀑布的声音在山谷中形成了一个分叉的回声。
2. 2. The old tree's branches were like a forked echo of its youth.
   老树的枝条像是它年轻时的分叉回声。
3. 3. The wind made a forked echo through the forest canopy.
   风在森林上空形成了分叉的回声。