Bronchus principalis sinister

例句：

1. 1. The patient was diagnosed with a bronchus blockage.
   患者被诊断出有主支气管阻塞。
2. 2.The surgery involved the removal of two bronchuses.
   手术包括切除两个支气管。
3. 3.The doctor advised him to avoid smoking and maintain good respiratory health.
   医生建议他戒烟并保持良好的呼吸健康。