联合体的英文缩写为combination。
双语例句：
1、关联企业是具有独立法律地位的企业之间的联合体。
Affiliated enterprise is a combination of several enterprise that is independent legal entity.
2、BMP业务管理被看作是建筑师和总承包商的联合体。
Think of the BPM engagement manager as a combination of the architect and general contractor.
