bronchial tree

例句：

1. 1. The bronchial tree is responsible for the distribution of air throughout the body.
   支气管树负责将空气在整个身体中分布。
2. 2. The bronchial tree is a complex network of tubes that carries oxygen and nutrients to the lungs.
   支气管树是一个复杂的管道网络，将氧气和营养物质输送到肺部。
3. 3.The bronchial tree can become blocked, leading to breathing difficulties.
   支气管树可能会堵塞，导致呼吸困难。