deep veins of upper limb

例句：

1. 1. The doctor performed an operation to remove the deep veins in my leg.
   医生为我腿部的深静脉进行了一次手术。
2. 2.Deep veins are responsible for carrying oxygenated blood back to the heart.
   深静脉负责将富含氧气的血液输送回心脏。
3. 3.During exercise, it's important to monitor the health of your deep veins to prevent injury.
   运动时，监测深静脉的健康以防止受伤非常重要。