iliac veins

例句：

1. 1. The surgeon removed the iliac veins to relieve the patient's pain.
   外科医生切除了髂静脉以缓解病人的疼痛。
2. 2.The iliac veins are responsible for carrying blood from the lower body back to the heart.
   髂静脉负责将血液从下肢输送回心脏。
3. 3. During surgery, the surgeon carefully dissected the iliac veins to avoid damaging the surrounding tissues.
   在手术中，外科医生小心地解剖髂静脉以避免损伤周围的组织。