名词
中文翻译：肾囊
同义词：
['renal capsule', 'renal sac']
例句：
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1.The nephrocoel is filled with fluids and blood.
肾囊内充满了液体和血液。
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2. The nephrocoel is a protective layer around the kidney.
肾囊是肾脏周围的保护层。
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3.The nephrocoel is responsible for filtering waste products from the blood.
肾囊负责过滤血液中的废物。