The Expires header specifies a Greenwich Mean Time (GMT) expiry.
Expires报头用于指定格林尼治标准时间(GreenwichMean Time,GMT)有效期。
You can probably safely set the Expires header a few months in the future.
你可以很安全地把Expires文件头设置为未来的几个月。
An Expires header can be used on all your scripts, CSS, and images as well.
Expires header可以在所有的图片，脚本与css上使用。
The browser knows how long to cache a particular file because the response that returned the file contained an Expires header.
服务器的响应中包含了静态文件保存的期限 信息，所以浏览器知道要把它们缓存多长时间。
When you use an Expires Header, you can cache those elements on the user’s local machine, not only increasing their speed, but also saving you bandwidth.
当你使用了Expires Header,你可以在用户的本地机器对这些元素进行缓存，不仅提高了他们的访问速度，也节省了你的带宽。
When you use an Expires Header, you can cache those elements on the user’s local machine, not only increasing their speed, but also saving you bandwidth.
当你使用了Expires Header,你可以在用户的本地机器对这些元素进行缓存，不仅提高了他们的访问速度，也节省了你的带宽。
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