2004年，百度允许广告客户付款使得相关搜索结果排名靠前，这一招是模仿美国加州帕萨迪娜市名为Overture的公司。
By 2004, Baidu was allowing advertisers to pay to appear at the top of related search results, mimicking a model pioneered by a Pasadena (Calif.) company called Overture.
谷歌否认故意改变搜索结果而让某些公司受益，同时也辩解道搜索结果排名产生的评价，在任何情况下这些搜索结果排名都被保护得像自由言论的一种形式。
Google denies that it deliberately modifies results to favour particular firms, and also argues that search rankings constitute opinions, and are thus protected as a form of free speech in any case.
提示：恰当的描述你的图像可以提升图像搜索结果的排名。
Hint: Properly describing your images can help your ranking in the image search results.
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