Because HTTP is a stateless protocol, there is no inherent information about the page a user looked at previously before he or she looks at another one.
由于HTTP是无状态的协议，不存在有关用户在查看另一个页面之前所查看的页面的固有信息。
Because HTTP is a stateless protocol, there is no inherent information about the page a user looked at previously before he or she looks at another one.
由于HTTP是无状态的协议，不存在有关用户在查看另一个页面之前所查看的页面的固有信息。
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