The stakeholders who have the proper access authorizations can require that the service be available 99% of the time and that the download time per page of the document be no more than four seconds.
拥有正确访问授权的涉众可能要求该服务在99%的时间内可用，并且每个文档页的下载时间不超过四秒。
Often, you have access to a URL, but it doesn't make sense to load the page each time the context changes as it adds overhead that might not be warranted.
通常情况下的确可以访问url，但是，每当上下文发生改变就装载该页面的行为并不合理，因为这增加了可能不必要的开销。
If the database access cost 7ms, the application server 13ms, and the Web server 5ms, then the service time of the Web page becomes 25ms.
如果数据库访问花费7ms，应用服务器花费13 ms,Web服务器花费5ms，那么网页的服务时间就是25 ms。
If your content changes often, but not on every page hit, consider setting a Cache-Control: max-age header; most users access pages again in a relatively short period of time.
如果你的内容经常改变，但是不是每次页面请求都改变，考虑设置一个Cache - Control： max -age头信息；大部分用户会在短时间内多次访问同一页面。
To save time, open the page without direct access to information.
节省时间，无需打开网页，直接获得信息。
Save time, having to open a web page, direct access to information.
节省时间，无需打开网页，直接获得信息。
While Facebook Live streams occur in real time, the videos can be replayed later by people with access to the page if the person who filmed it chooses that option, until the videos are taken down.
虽然FacebookLive频道的视频流是实时播放的，但如果拍摄的人选择了相关选项，在视频被删除前，可以在之后的时间里被有权限访问该页面的人回放。
While Facebook Live streams occur in real time, the videos can be replayed later by people with access to the page if the person who filmed it chooses that option, until the videos are taken down.
虽然FacebookLive频道的视频流是实时播放的，但如果拍摄的人选择了相关选项，在视频被删除前，可以在之后的时间里被有权限访问该页面的人回放。
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