cotree

例句：

1. 1. The tree was cut down and the stump remains.
   这棵树被砍倒了，树桩还在。
2. 2.The stump of the fallen tree is a reminder of the past.
   倒下的树桩是过去的回忆。
3. 3. The stump of the old tree has become a home for many birds.
   老树的树桩成了许多鸟儿的家。