例句與造句

1. I don't think there's any custom of parallel-cousin marriage ( where both types of parallel cousins would be preferential marriage partners ) . . . And many societies have very precisely defined genealogical groups; the simplest version is the " moiety " system, where half the people of a tribe are in one genealogical group, and half in the other.
2. It's difficult to find preferential marriage in a sentence. 用preferential marriage造句挺難的