1、 Down syndrome is the most common genetic cause of mental retardation are mildly to moderately retarded.
唐氏综合症是精神迟缓的最普遍的遗传起因.
来源:网络期刊摘选
2、 Lead is a multitargeted toxicant on organisms, causing effects in mental retardation, low function, hypertension, nephropathy.
铅对生物体具有多方面的毒性, 可导致智力低下 、 血机能障碍 、 血压、病等, 其毒性机理还在探索阶段.
来源:互联网
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