入口数据队列有一个数据队列头段结构，包括一个待处理分组区。

The ingress data queue has a data queue head structure, including a packets-to-be-processed field.

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在这种情况下，可以认为信封相当于消息头，而地址相当于队列名。

In our circumstance the envelope can be considered equivalent to the message header, while the address is the queue name.

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消息头保持纯文本格式，以便队列管理器能够正确路由它。

The message header remains in plain text so that the queue manager can route it properly.

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