top 10 most popular search engines in the world (fast)
serp代表"搜索引擎结果页",英文search engine results page的首字母
browser"和"preferred search engine"选项,对应的就是浏览器和搜索
使用web of science数据库检索文献,分析文献和统计引用次数
google, bing, yahoo in 24 hours over 90% of search engine
Tips:Do Not Provide
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