returning vein

例句：

1. 1.The doctor found a returning vein in her arm that needed to be treated immediately.
   医生在她的手臂里发现了一个回流的静脉，需要立即治疗。
2. 2. During surgery, the surgeon carefully dissected the reflux vein to avoid damaging nearby tissues.
   在手术中，外科医生小心地解剖回流静脉，以避免损伤附近的组织。
3. 3. The patient's blood pressure was elevated due to a returning vein in the brain.
   患者的血压升高是由于大脑中的回流静脉引起的。