vein eyelets

例句：

1. 1. The doctor examined the patient's swollen veins.
   医生检查了病人肿胀的静脉。
2. 2. Blood flows through the body's veins to deliver oxygen and nutrients.
   血液通过身体的静脉输送氧气和营养物质。
3. 3. The veins in her arm were so prominent that they could be seen easily.
   她手臂上的静脉非常明显，很容易就能看出来。