英语语法分析

First check that the accident victim doesn't have an obstructed airway.

首先要确保事故受伤者的气道通畅。

《牛津词典》

Finally, the coughing reflex in reaction to irritants in the airway produces not a cough during sleep but a cessation of breathing.

最后，对呼吸道刺激物的咳嗽反射不会导致人们在睡眠期咳嗽，而会造成呼吸暂停。

Healthy lungs produce a natural antibiotic that protects them from infection by routinely killing harmful bacteria on airway surfaces.

健康的肺部会产生一种天然的抗生素，通过杀死呼吸道表面的有害细菌来保护肺部不受感染。