基本上你自己创建中间表，并有一对多联系吧。
Basically you create the middle table yourself, and have many-to-one relationships to it.
刚才已经提到，联系人中地址包容的二元关系由关系型DAS假定为一对多的关系。
As mentioned, the cardinality of the address containment within a contact is assumed by the Relational DAS to be one-to-many.
对于一些关系加强联系(从多对一改为一对一)。
Tighten the cardinality (from many-to-one to one-to-one) for some of the relationships.
对于一些关系加强联系(从多对一改为一对一)。
Tighten the cardinality (from many-to-one to one-to-one) for some of the relationships.
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