each of a pair of organs in the abdominal cavity of mammals, birds, and reptiles, excreting urine
肾,肾脏。
[mass noun]the kidney of a sheep, ox, or pig as food
(可食的猪、牛或羊的)腰子。
[mass noun]temperament, nature, or kind
个性,脾气;类型
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I hoped that he would not prove of similar kidney .我希望他最终将证实不是同一类型的人。
" Middle English: of obscure origin."