co-tree

例句：

1. 1. The co-tree is a symbol of unity and cooperation.
   共树是团结与合作的符号。
2. 2. In the forest, co-trees are essential for pollination and seed dispersal.
   在森林中，共树对于授粉和种子传播至关重要。
3. 3. The co-tree's leaves provide shelter and food for many animals.
   共树的叶子为许多动物提供了庇护所和食物。