相反，几分钟就要更新一下信息的天气地图页面，用缓存就不好了。
On the other hand, if you are displaying a page with a weather map containing new information by the minute, it would not make sense to cache this page.
因此，我们可以综合生成一个全网的天气地图，使用“网络天气地图”来形象地表示网络中各个区域的负载程度、传输时延等指标。
Therefore, we could construct this kind of weather map about the whole network, and show Internet index such as load and delay of regions in the network through it.
用户可以使用它们上网冲浪，搜索地图和天气报告。
Users can use them to surf online and search for maps and weather reports.
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