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Onychoatrophy is a faulty underdevelopment of the nail that may be congenital or acquired, in which the nail is thinned and smaller.
依恋情感网英汉例句词典收录3870147条英语例句词条，基本涵盖了全部常用英语单词的释义及例句，是英语学习的有利工具。