铅会对智力和身体发育造成损害，甚至对未出世的胎儿也是如此。
Lead can harm mental and physical development even in babies before they are born.
儿童身体和智力的发育，都会受到铁元素匮乏的影响。
A child's development, both physical and mental, is stifled by a lack of iron.
儿童身体和智力的发育，都会受到铁元素匮乏的影响。
A child's development, both physical and mental, is stifled by a lack of iron.
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