external iliac vein

例句：

1. 1. The surgeon performed a successful operation on the patient's external iliac vein.
   外科医生成功地为患者进行了外部髂静脉手术。
2. 2.The anatomy of the external iliac vein is crucial for understanding blood flow in the lower extremities.
   了解下肢血流的解剖学，特别是外髂静脉的解剖学至关重要。
3. 3. In some cases, the external iliac vein may be dilated due to underlying conditions such as varicose veins or deep vein thrombosis.
   在某些情况下，由于静脉曲张或深静脉血栓等疾病，外髂静脉可能会扩张。