attenuated polyandry有限一妻多夫婚
polyandry polygamy一妻多夫
fratemal polyandry兄弟共妻
Fraternal polyandry兄弟共妻;一妻多夫制
adelphic or fraternal polyandry兄弟的一妻多夫制
levels of polyandry一妻多夫水平
Polyandry, as a rare form of marriage in the world, has been prevalent for a very long historical period in Tibet.
一妻多夫婚姻作为世界上一种罕见的婚姻形式在西藏普遍存在了很长一段历史时期。
参考来源 - 西藏一妻多夫婚姻研究N（名词） the practice or condition of being married to more than one husband at the same time 一妻多夫 → compare polygamy