在队列系统中，总会存在一个显式的第三方队列系统，发送者放入消息，接收者再从中取出。

In a queue-based system, there is an explicit third party (the queue) where messages the sender must put messages and the receiver get messages from.

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JMS发送者推送一条消息到JMS消息队列就如同寄件人把一封信件放到了邮箱。

A JMS sender puts a message in a JMS queue similar to a sender putting an envelope in the mail box.

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发送者上下文信息描述将消息放入当前存储消息的队列中的应用程序。

Origin context information describes the application that put the message on the queue on which the message is currently stored.

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