对于网络商家来说，网页搜索得到的排序——其工作原理是被严格保密的——反映了各自坐次的高低，其结果往往决定了生死和胜负。
For many online businesses, their position in its search ranking—the workings of which are a closely guarded secret—is a matter of life or death.
文章分析了恶意网页的危害性和工作原理，介绍了防御方法。
In this paper, the harm and the principle of malicious Web page are analyzed; meanwhile, the defense is introduced.
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