renal vein

例句：

1. 1. The kidneys are responsible for filtering blood and removing waste products.
   肾脏负责过滤血液并清除废物。
2. 2. The renal vein carries waste products from the kidneys back to the heart.
   肾静脉将肾脏产生的废物从心脏带回。
3. 3. Diabetes can damage the kidneys and lead to a condition called nephropathy.
   糖尿病可以损害肾脏并导致一种叫做肾病的疾病。