求翻译：独生子女的平均ＩＱ显著高于非独生子女。家庭教育分数高。家庭智力环境相对优越，儿童的智力发育基本上是由家庭现存的智力水平决定的。独生子女的家庭经济条件和住房条件与儿童ＩＱ密切相关。独生子女的营养条件明显优越。独生子女多为头生子，先天素质好。是什么意思？

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One child's average IQ significantly higher than that of non-child families. Family education score higher. Family intellectual environment relative superiority, it is basically a children's mental development family existing intellectual level of decision. The one-child family economic conditions a

Only child's average IQ obviously is higher than the non-only child.The home education score is high.The family intelligence environment is relatively superior, child's intelligence growth basically is decides by the family extant intelligence level.Only child's home economics condition and housing

The average IQ of only child significantly higher than non-only child. Family education score higher. Family superior intellectual environment, children's intellectual development is largely determined by the family of the existing level of intelligence. One-child family is closely related to econom