exogamy
noun [ U ] social science specialized uk/ɪkˈsɒɡ.ə.mi/ us/ɪkˈsɑː.ɡə.mi/
异族通婚
the fact or custom of marrying someone from outside your group
Urban life contributes directly to increased exogamy. 城市生活直接带来了异族通婚的增加。
Compare: endogamy