1、Tracheitis is an inflammation of the trachea, often caused by a viral or bacterial infection.
气管炎是气管发炎引起的，通常是由病毒或细菌感染引起的。

2、The most common symptom of tracheitis is a persistent cough that may produce mucus or blood.
气管炎最常见的症状是持续咳嗽，可能会产生痰液或血液。