background d queue 后台排队
We also analyzed the average queue delay of MAC layer by modeling the interface queue of each node with M/D/1 model.
然后用M/D/1排队模型对每个节点的MAC层队列建模，分析了MAC层队列的平均排队延迟。
Visitor d: You see. I take my old father and little child. Is there any way to speed up the queue?
参观者d：你看，我陪着一老一小的，有什么方法可以快点参观吗？
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