The first part discussed the relation between mate selection and eugenics, including mate’s age, consanguinity, constitution.
第一部分孕前为择偶与优生,涉及年龄、血缘、体质与优生的关系。
参考来源 - 中医优生思想研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Owens and Olson hypothesize that the presence of carotenoids, as signaled by coloration, would be meaningful in the context of mate selection if carotenoids were either rare or required for health.
欧文斯和奥尔森假设，如果类胡萝卜素是稀有的或对健康有要求的，则通过着色指示的类胡萝卜素的存在在配偶选择的背景下将是有意义的。
This, the researchers say, suggests an evolutionary component is at work for mate selection.
研究者说，这反映了对配偶选择起作用的一个进化因素。
Other factors, such as hormones, determine the pitch of your voice and may also affect your mate selection.
其他因素，例如激素，决定了你的音高，也会影响你的选择。
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