References to Function Objects 引向函数对象的引用
Objects in one class might contain references to objects in another class.
一个类中的对象可能包含了另一个类对象的引用。
Will you need your connector to keep references to objects in your repository?
是否需要连接器不断引用存储库中的对象呢？
You also need to be able to store references to objects of different lifetimes.
您还需要能够存储对具有不同生存期的对象的引用。
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