一个肾单元包含一个毛细血管丛(肾小球)和一个细小的小管(肾小管)，进而引导到更粗大的收集管。

Each nephron contains a tuft of capillary blood vessels (glomerulus) and tiny tubules that lead to larger collecting tubes.

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去年，研究SARS病毒的医生发现该病毒与肾素血管紧张素系统的受体结合，他们起初感到不解，这是一条先前未与肺有关的途径。

Last year, doctors studying the SARS virus were at first confused to find that the virus bound to a receptor in the renin-angiotensin system, a pathway not previously associated with the lungs.

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目的提高肾脏良性肿瘤—肾血管平滑肌脂肪瘤（AML）的术前诊断及鉴别诊断水平。

Objective To improve the level of preoperative diagnosis and differentiated diagnosis of renal benign tumor, that is angiomyolipoma(AML).

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