这里隐含着一个难以察觉但非常重要的要求，在设计时，您必须知道目的地是队列还是主题。

A more subtle but important implication is that you had to know whether the destination was a queue or a topic at design time.

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jms目的地类型：队列或主题。

The JMS destination type, queue or topic.

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您可以把目的地看作是队列及主题的泛化。

You can think of destinations as a generalization of a queue and topic.

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