用户可以用书签来访问第一个站点，然后就可以通过指定url到达其它的任何站点。
The user can access the first site using a bookmark, and then go to any other site by specifying a URL. Unrestricted surfing is implemented in the following way.
用户可以用书签来访问第一个站点，然后就可以通过指定url到达其它的任何站点。
The user can access the first site using a bookmark, and then go to any other site by specifying a URL. Unrestricted surfing is implemented in the following way.
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