primary atelectasis

例句：

1. 1. The patient was diagnosed with primary atelectasis and required immediate treatment.
   该患者被诊断为原发性肺不张，需要立即治疗。
2. 2. In the case of primary atelectasis, early intervention is crucial for recovery.
   在原发性肺不张的情况下，早期干预对于恢复至关重要。
3. 3.The doctor explained that primary atelectasis can be caused by various factors, including smoking and air pollution.
   医生解释说，原发性肺不张可以由多种因素引起，包括吸烟和空气污染。