Exogamy remains much less prevalent among African Americans.

异族婚姻在美国人仍然很少见。

For two millennia, exogamy was a major transgression for Jews.

两千年来，异族婚一直是犹太人的一大禁忌。

The chief of these questions respect the origin of exogamy and of endogamy.

这些问首要的同外婚制和内婚制的起源有关。