One-To-Many Associations 一对多关联
The core of associative memory for many to many associations is how to realize associative memory for one to many associations, that is, how to recognize common items in memory patterns.
多对多联想记忆的核心是如何实现一对多联想记忆，也即是如何识别记忆模式中的公共项。
The second is pojoA has one-to-many associations with many other POJOs such as pojoB and pojoC.
第二种场景，pojoA和很多其他POJO有one-to-many关联，例如pojoB和pojoC。
Collections can either model value types (element or composite-element) or entity reference types (one-to-many or many-to-many associations).
集合可以是值类型的(元素或组合元素)，也可以是实体引用类型的(one - to - many或many - to - many关联)。
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