Third, traits like these are always the result of interactions between genes and environment. A woman could have genes that would tend to make her taller than average but end up shorter than average if she had been poorly nourished as a child.&#160;
第三，这些特性通常都是基因与环境互相作用的结果。一位妇女身上可能携带着令她长得比同龄人更高的基因，但由于儿童时期缺乏营养，她可能最终会成为一个矮个子。