Darwin's request was denied, but his concern lives on today. More than half of the states in the U.S. have explicit limits on first-cousin marriages.

达尔文的要求被拒绝了，但是他的担忧如今仍存在，美国超过一半的州都对第一代表亲结婚进行了明确的限制。

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Darwin's request was denied, but his concern lives on today. More than half of the states in the U.S. have explicit limits on first-cousin marriages.

达尔文的要求被拒绝了，但是他的担忧如今仍存在，美国超过一半的州都对第一代表亲结婚进行了明确的限制。

youdao