Objective To observe the effect of speech therapy on the intelligence of children with developmental retardation of speech.
目的观察言语治疗对发育迟缓儿童智力的影响。
However, muscle spasms, hyperreflexia, refractory epilepsy, developmental delay, and mental retardation are common in children afflicted with the disorder.
然而，肌痉挛、反射亢进、顽固性癫痫、发育迟缓、智力低下是常见的症状。
Symptoms can vary from normal to severe developmental delay or mental retardation.
症状变化较大，可以是正常的或严重的发育延迟或智力低下。
Symptoms can vary from normal to severe developmental delay or mental retardation.
症状变化较大，可以是正常的或严重的发育延迟或智力低下。
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