通婚的英文：
intermarriage
intermarry

The two families were united in marriage
那两个家庭通婚联姻。

As intermarriage in the gens was prohibited, it withdrew its members from the evils of consanguine marriages
由于民族内部禁止通婚，其成员才得免于血亲通婚的弊害。

The priestly caste does not normally intermarry with the warrior caste.
教士阶级通常不与武土阶级通婚。

The only exclusive class in Egypt which did not intermarry was the semi-divine royal family
在埃及，其实只有半神圣的王室是唯一具有排他性的阶级，才是不能和其他阶级通婚的。

A peeress by marriage afterwards intermarried with a commoner.
一个嫁给贵族而成为贵妇人的女子后来又与一个平民通婚(结婚)。

"exogamy:The custom of marrying outside the tribe, family, clan, or other social unit."
异族通婚:同外部部落、家庭、部族或其他社会单元通婚的风俗.

"any of numerous hereditary, endogamous social subclasses stratified according to Hindu ritual purity."
根据印度教仪式的纯洁性划分的无数个世袭的、内部通婚的次等级之一。

but do you forget that it is among the Catalans a sacred law to intermarry?"
你忘记了同族通婚是我们迦太罗尼亚人的一条神圣的法律了吗？”

Leading families intermarry;practically everyone in the top flight is thus related.
显赫的家族之间相互通婚;因此上层社会的人差不多都是沾亲带故。