biopsy of urethra

例句：

1. 1. The doctor performed a biopsy on the patient's skin to diagnose the condition.
   医生对患者的皮肤进行了活体检查以诊断病情。
2. 2.During the biopsy, the doctor removed a small sample of tissue for further analysis.
   在进行活体检查时，医生取出了一小份组织样本以便进一步分析。
3. 3. The pathologist performed a biopsy to determine the cause of the tumor.
   病理学家进行了活体检查以确定肿瘤的原因。