1. A man or boy whose testes are nonfunctioning or have been removed. 
   阉人丧失睾丸功能或被除去睾丸的男人或男孩
2. A rudimentary or degenerate, usually nonfunctioning, structure that is the remnant of an organ or a part that was fully developed or functioning in a preceding generation or an earlier stage of development. 
   退化器官在先前一代或较早的发展阶段之后的退化器官，它是初级的或衰落的，并且经常是不再起作用的结构

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• 1. 非機能性
  非機能性（nonfunctioning）, 膵内分泌腫瘍（endocrine tumor of the pancreas）, 膵島細胞腫瘍（islet cell tumor）
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