sink tree

例句：

1. 1. The sink tree was a symbol of the town's industrial past.
   沉木树是这个城镇工业历史的象征。
2. 2. The sink tree is an important habitat for many species of birds and insects.
   沉木树是许多鸟类和昆虫的重要栖息地。
3. 3. The sink tree has been used as a teaching tool in environmental education classes.
   沉木树被用作环境教育课程的教学工具。