This is one function of the universal incest taboo, the prohibition of sex between close relatives.

这是普遍的乱伦禁忌的一个功能，即禁止近亲之间发生性关系。

The incest taboos between members of the same clan are as severe as between true brothers and sisters.

同族成员之间的乱伦禁忌与真正的兄弟姐妹之间一样严格。

The files of the cross-cultural survey at Yale University are organised according to categories such as marriage ceremonies, life crisis rights, incest taboos.

耶鲁大学跨文化调查的档案是按结婚仪式、生活危机权利、乱伦禁忌等类别组织的。