mucus barrier

例句：

1. 1. The bacteria in the mucus barrier are responsible for the infection.
   黏液屏障中的细菌是感染的原因。
2. 2. The researcher found a new way to treat skin conditions using the mucus barrier as a barrier.
   研究者发现了一种使用黏液屏障作为屏障来治疗皮肤疾病的方法。
3. 3. The mucus barrier plays an important role in preventing infections in the respiratory tract.
   黏液屏障在呼吸道中防止感染方面起着重要作用。