vannal vein

例句：

1. 1.The doctor found a small vannal vein in her arm.
   医生在她的手臂里发现了一条小静脉。
2. 2. Blood flows through the vannal veins to the heart.
   血液通过静脉流向心脏。
3. 3. He was worried about the possibility of a blockage in his vannal veins.
   他担心他的静脉可能阻塞了。