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传统观点认为鸟类及哺乳类动物听毛细胞受到后天因素破坏后则失去再生能力，从而导致不可逆的神经性耳聋。自从Ｃｒｕｚ（１９８７）首次发现庆大霉素中毒后小鸡内耳被破坏的毛细胞可以再生以来，这种传统观念得到更新。进一步研究表明，虎皮鹦鹉毛细胞受损后也具有相似的再生
The traditional view that birds and mammalian hair cells after acquired damage to acquired ability to regenerate, resulting in irreversible neurological deafness. This traditional notion has been renewed since Cruz (1987) first discovered that damaged hair cells in the inner ear of chickens could be regenerated after gentamicin poisoning. Further studies have shown that the skin cells of Parrot also have similar regeneration after they have been damaged