在两个需要进行大量数据交换的地点之间——比如洛杉矶和纽约——流交换会在网络上建立一条专用链路。
Between locations that exchange large volumes of data - say, Los Angeles and New York City - flow switching would establish a dedicated path across the network.
这次空运，不仅仅是历史上唯一一次空中运输大量煤炭，还给航空交通管制和货运管理带来了飞跃，甚至还用电报机临时搭建起了简单粗糙，但行之有效的电子数据交换系统。
The airlift was not just the only time in history when large quantities of coal have been delivered by air. It also brought leaps in air-traffic control and cargo handling.
如果有大量的数据交换更会特别的慢。
It would be especially slow if large datasets were exchanged.
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