pinnate vein

例句：

1. 1. The doctor examined the patient's pinnate veins and found no blockage.
   医生检查了患者的静脉，没有发现阻塞。
2. 2. The scientist discovered a new type of pinnate vein in the coral reef.
   科学家在珊瑚礁中发现了一种新的静脉类型。
3. 3. During surgery, the surgeon carefully dissected the pinnate veins to avoid damaging them.
   手术中，外科医生小心地解剖静脉以避免损伤它们。