Nager syndrome (or acrofacial dysostosis) is an extremely rare congenital defect that has only had around 90 documented cases to date (02/06/07).是什么意思_Nager syndrome (or acrofacial dysostosis) is an extremely rare congenital defect that has only had around 90 documented cases to date (02/06/07).在线翻译_英语_读音_用法_例句