名词
中文翻译：囊
同义词：
['sac', 'bag', 'pouch']
例句：
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1. The ampulla of thevas deferens is a smallsac that holds sperm.
输精管的囊是一小囊，里面装着精子。
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2. The ampulla of the vasdeferens is a small sac that holds sperm.
输精管的囊是一小囊，里面装着精子。
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3.The ampulla of the vasdeferens is a small sacthat holds sperm.
输精管的囊是一小囊，里面装着精子。