lower respiratory tract

例句：

1. 1.The doctor advised him to take a deep breath and lower his chest.
   医生建议他深呼吸并降低他的胸部。
2. 2.The patient's lower respiratory tract was severely affected by the infection.
   患者的下呼吸道严重受到了感染的影响。
3. 3. During the examination, the doctor carefully listened to the patient's lower respiratory sounds.
   在检查过程中，医生仔细倾听了患者的下呼吸道声音。