For instance, with slight modification you can introduce the state pattern with some persistence to keep track of conversational state.

例如，只需稍作修改，就可以为state模式引入持久性，以跟踪会话状态。

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What we have achieved so far is a lean and mean implementation of a DAO pattern which allows the persistence of 'state-only' entities.

到目前为止，我们精简了DAO模式的实现，该实现只能持久化实体的状态。

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A downside of the Open Session in View pattern is that the persistence-context object is effectively scoped to a user request.

Open Session in View模式的一个缺点是持久化上下文对象被高效地划定到用户请求作用域内。

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