Linea anorectalis

例句：

1. 1. The doctor drew a linea anorectalis on the patient's chart.
   医生在病人的病历上画了一条直肠线。
2. 2.The patient was instructed to follow the linea anorectalis for pain relief.
   患者被指示按照直肠线来缓解疼痛。
3. 3.During surgery, the surgeon carefully followed the linea anorectalis to avoid damaging the tissue.
   手术中，外科医生小心地遵循直肠线以避免损伤组织。