单词：propagation delay
propagation delay的用法和样例：
例句
- Topology changes in one part of a network are not instantly known in other parts of the network due to propagation delay.由于传播延迟，某部份的网路拓扑改变时，在网路的另一个部分并不见得能立即知道。
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[00:03.81]cash on delivery :货到付款 [00:06.24]delay :v.延迟 [00:07.93]free on board :船上交货 [00:10.18]ground delivery :海陆运输 [00:12.37]letter of credit :信用状 [00:14.44]lump sum :一次付清 [00:16.29]Net 30 :货到后三十日
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