postanal transverse groove

例句：

1. 1. Thepatient's postanal transversegroove was enlarged, which could bea sign of an underlying condition.
   患者的肛门横沟扩大了，这可能是某种潜在疾病的迹象。
2. 2. During surgery, the surgeon carefully dissected the postanal transversegroove to avoid damaging the nerves.
   在手术过程中，外科医生小心翼翼地解剖肛门横沟，以避免损伤神经。
3. 3. The patient's postanal transverse groove wasenlarged, which could be a signof an underlying condition.
   患者的肛门横沟扩大了，这可能是某种潜在疾病的迹象。