这些包括一对一和一对多构成关联，以及多对一和多对多的聚合关联。
These include one-to-one and one-to-many composition associations and many-to-one and many-to-many aggregation associations.
JPA支持一对一、一对多、多对一和多对多关系。
JPA supports one-to-one, one-to-many, many-to-one, and many-to-many relationships.
如果您有多种彼此相关的记录，您也可以定义一对多、多对一、和多对多的关系。
If you have multiple types of records that are related to each other, you can define one-to-many, one-to-one, and many-to-many relationships as well.
由于有向超图具有坚实的数学基础和严格的形式化分析手段，能够清楚地描述多对多、一对多、多对一的关系。
Due to directed hypergraph's mathematical foundation and rigorous formal analysis ability, it can describes clearly the relationship of many-to-many, one-to-many, and many-to-one.
由于有向超图具有坚实的数学基础和严格的形式化分析手段，能够清楚地描述多对多、一对多、多对一的关系。
Due to directed hypergraph's mathematical foundation and rigorous formal analysis ability, it can describes clearly the relationship of many-to-many, one-to-many, and many-to-one.
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