Pars labialis

例句：

1. 1. The doctor examined the patient's pars labialis and found no signs of infection.
   医生检查了患者的唇瓣，没有发现感染的迹象。
2. 2.During surgery, the surgeon carefully removed the pars labialis to prevent damage to the surrounding tissues.
   在手术中，外科医生小心地切除了唇瓣，以防止周围组织的损伤。
3. 3. The patient was advised to keep the pars labialis moistened with a saline solutionto promote healing.
   患者被建议用生理盐水湿润唇瓣，以促进愈合。