Episode digest: introduce the digestive system and the urinary system.
第三集消化：主要介绍消化系统和泌尿系统。
About 90 percent of stones pass through the urinary system without treatment.
约有百分之九十的石头通过泌尿系统的治疗。
As yet, the research about this field is not clear in urinary system.
到目前为止，在泌尿系统，该领域的研究还不十分清楚。
BTCC is the most common urinary system carcinoma.
膀胱癌为泌尿系统最常见的恶性肿瘤。
BTCC is the most common urinary system carcinoma.
膀胱癌为泌尿系统最常见的恶性肿瘤。
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