联合关系 meaning in English

simultaneous relationships

As kelemvor and mystra ( midnight ) were lovers in their mortal life it has brought about an unusual alliance
当克兰沃和密斯拉（午夜）同为凡人情侣时，两人间就有不寻常的联合关系。
Instances can also be combined into arbitrary federated relationships to form more complex , distributed environments
实例还可以结合到任意的联合关系中，构成更复杂的分布式环境。
The generated udfs can be used in sql statements to combine relational data with dynamic data retrieved from a web service
所生成的udf可用于sql语句中，用以联合关系数据和从web服务中检索的动态数据。