double worked tree

例句：

1. 1. This tree is so old that it has been double-worked for centuries.
   这棵树非常古老，已经有几百年的历史了。
2. 2. The forest was once a thriving ecosystem, but now it's mostly double-worked and overgrown.
   这片森林曾经是一个繁荣的生态系统，但现在大部分被砍伐和荒废了。
3. 3.The double-worked tree provides shade and shelter for many animals in the area.
   这个双重工作的树为该地区的许多动物提供了阴凉和庇护所。