respiratory tree

例句：

1. 1. The respiratory tree is a complex network of airways that helps to distribute oxygen throughout the body.
   呼吸树是一个复杂的空气管道网络，帮助将氧气输送到身体的各个部位。
2. 2. The respiratory tree plays a crucial role in maintaining the balance of gases in the lungs.
   呼吸树在肺部气体平衡中起着至关重要的作用。
3. 3. The respiratory tree is responsible for filtering out harmful particles from the air we breathe.
   呼吸树负责过滤我们呼吸的空气中的有害颗粒。