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Studies show that iodine deficiency is the leading preventable cause of mental retardation .

研究显示，缺碘是智力发育迟缓的一个主要但可预防的因素。

Unlike people with classic autism , which is often accompanied by mental retardation , those with asperger 's have normal language development and intelligence .

与通常伴随精神发育迟缓的典型自闭症患者不同，阿斯伯格综合症患者具有正常的语言能力和智力。

Autism encompasses a wide spectrum of disorders , ranging from profound inability to communicate and mental retardation to relatively mild symptoms , as in asperger 's syndrome .

孤独症包含很大范围的机体失调，从严重的沟通无能症和精神发育迟缓症，到阿斯伯格综合症这类比较轻微的症状，都是孤独症的范围。

Preference objects as treatment for hand mouthing in a child with mental retardation .

以喜爱的东西来处理智能障碍学童的含手行为。

Someone with a very funny retardation .

反映非常迟钝有趣的人。