absence of pectoralis major

例句：

1. 1. The patient had a significant absence of pectoralis major muscle, which affected his ability to lift heavy objects.
   患者胸大肌严重缺失，这影响了他举起重物的能力。
2. 2. Due to the absence of pectoralis major muscle, the patient was unable to support his own weight.
   由于胸大肌缺失，患者无法支撑自己的体重。
3. 3. The absence of pectoralis major muscle made it difficult for the patient to perform daily activities.
   胸大肌缺失使得患者难以进行日常活动。