gradate vein

例句：

1. 1.The gradate veins in the brain are responsible for carrying oxygenated blood to the brain cells.
   大脑中的分枝静脉负责将富含氧气的血液输送到脑细胞。
2. 2. The gradate veins in the liver play a crucial role in removing waste products from the body.
   肝脏中的分枝静脉在清除体内废物方面起着至关重要的作用。
3. 3. Blood flow through the gradate veins is essential for maintaining the health of the heart and lungs.
   通过分枝静脉的血流对于心脏和肺部的健康至关重要。