cache-control

基本解释

Two other headers are used in tandem with Cache-Control to control retention
另外两个报头将与 Cache-Control 结合使用来控制保持力
Uses the Cache-Control response header to determine whether to cache the resource (make a local copy of it) or not.
使用 Cache-Control 响应 Header 确定是否缓存资源（创建资源的本地副本）。
Maybe one CSS file had a different Cache-Control header than all of the other files, or maybe the browser kicked out of cache because it was running out of allocated space.
也许一个 CSS 文件拥有一个与其他所有文件都不同的 Cache-Control 头部，或者，也许是浏览器因为耗尽了已分配空间而无法缓存。