Those in their 40s and 50s in particular may have no knowledge that they have relatives of any kind , says university of minnesota professor charlie lakin , who has studied demographics of the developmentally disabled 来自明尼苏达大学研究发育障碍群体人口统计学的查理?拉金教授声称，他们对于自己有没有亲戚一无所知，特别是那些年纪在40 、 50岁的患者。
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Those in their 40s and 50s in particular may have no knowledge that they have relatives of any kind , says university of minnesota professor charlie lakin , who has studied demographics of the developmentally disabled 明尼苏达大学教授查理?拉金是专门研究发育性残疾人群问题的，他说，现在特别是那些四十几到五十几岁的智障者，都完全没有任何亲人亲戚概念了。
