Even if your components have a far future Expires header, a conditional GET request is still made whenever the user hits Reload or Refresh.
即使您的组件具有远的未来过期标头，一个条件GET请求仍付款时，用户点击Reload或刷新。
Click reload to reload or refresh the templates into the development environment.
单击Reload来重新加载或者刷新开发环境中的模板。
Users access the feeds when they reload or refresh the RSS readers or Web sites or portlet pages.
当重新加载或者刷新rss阅读器、Web站点或portlet页面时，用户将访问提要。
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