alveolar crest fibers

例句：

1. 1.The alveolar crest fibers are responsible for the exchange of gases between the air sacs and the bloodstream.
   气道上皮纤维负责在肺泡和血液之间交换气体。
2. 2. During sleep, the alveolar crest fibers help to filter out harmful particles from the air we breathe.
   在睡眠时，气道上皮纤维帮助我们过滤掉我们呼吸的空气中的有害颗粒。
3. 3. Alveolar crest fibers play a crucial role in maintaining lung health and preventing respiratory diseases.
   气道上皮纤维在维护肺部健康和预防呼吸系统疾病中起着至关重要的作用。