1.Exogamy remains much less prevalent among African Americans.

1.异姻在非洲裔美国人中仍然很少见。

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

2.两千年来，异一直是犹太人一大禁忌。

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

3.这些问题中最首要制和内制起源有关。