respiratory trees

例句：

1. 1. These trees are a symbol of the forest's resilience.
   这些树木是森林恢复力的象征。
2. 2. The park has a variety of respiratory trees, providing shade and oxygen for visitors.
   公园里有各种呼吸树，为游客提供阴凉和氧气。
3. 3. The researchers found that some respiratory trees were more resistant to pests than others.
   研究人员发现，一些呼吸树比其他树更能抵抗害虫。