As the severity of the obstruction to expiratory flow increases, patients become increasingly dyspneic.

隨著呼氣性阻塞越來越嚴重, 病人的呼吸困難也逐漸加重.

The next morning the patient became extremely dyspneic and weak.

第2天早晨,病人呼吸變為非常困難和衰弱.