primitive group marriage原始群婚
bloodline group marriage血族群婚
A Group Marriage Ceremony集体婚礼
group marriage system群婚制
ethnic group marriage conventions民族婚俗
closed group marriage交换伴侣
non-bloodline group marriage族外群婚
flash marriage group闪婚族
Pre-Marriage Group婚前检查
N（名词） an arrangement in which several males live together with several females, forming a conjugal unit 群婚(几名男子与几名女子生活在一起并共为夫妻)