renal hilum

例句：

1. 1. The kidneys are responsible for filtering blood and removing waste products.
   肾脏负责过滤血液和去除废物。
2. 2.The surgeon removed the tumor from the patient's renal hilum.
   外科医生从患者的肾门处取出了肿瘤。
3. 3.The patient was given a kidney transplant, which required surgery on the renal hilum.
   患者接受了肾脏移植手术，这需要对肾门进行手术。