Imagine an Internet that is not just flat pages connected with hyper links but a real cyber space where a door in one Web Site leads to a different Web Site.

• 试想一下，如果网络页面不再只是罗列平平无奇的超级链接，而是像真正的虚拟空间那样推开门便进入到另一个界面，那将是多么引人入胜。