模式不同，只有在带宽。

The models differ only in bandwidth.

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加入叠加网多播的主机在带宽及其他方面存在异构性。

Hosts in overlay multicast systems have heterogeneity in both of bandwidth and other characteristics.

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其四，在带宽波动大、网络延迟大的广域网环境下难以实现稳定、实时的流服务。

Lastly, under the poor WAN environment, this architecture can not provide stable and real-time streaming service.

youdao

We have plenty of band with a long distance and thanks to local area networks like my own baby Ethernet, we have plenty of bandwidth in local area that was inside of buildings. But there is a gap, there is a gap between the LAN, the local area network, and the WAN, the Wide Area Network.

我们有大量长距离网带,多亏了局域网，就像我的宝贝,以太网，我们在本地有大量的带宽,那都在建筑物内部的，但是这儿有空白,在LAN之间有空白地带，即局域网,以及WAN，广域网。

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