retraction是什么意思？

retraction

例句

• capsular retraction 被膜牵拉
• Objective To prevent or decrease eyelid retraction and ectropion following lower eyelid blepharoplasty. 目的为了预防和降低下睑袋整形术后睑退缩和睑外翻等并发症的发生.
• No correlation between the amount retraction and postoperative dysphagia was observed. 食管收缩量与术后吞咽困难间并无关联.
• Internal rotation is accompanied by scapular retraction and associated clavicular movements. 内旋转会伴有肩胛骨回缩及相关的锁骨运动.