urea clearance test

例句：

1. 1. Urea clearance test is used to measure the rate of urea excretion in urine.
   尿素清除试验用于测量尿液中尿素的排泄速率。
2. 2.The patient's blood urea level was elevated during the urea clearance test.
   在尿素清除试验期间，患者的血尿素水平升高。
3. 3. The results of the urea clearance test were abnormal, indicating a potential kidney problem.
   尿素清除试验的结果异常，表明可能存在肾脏问题。