为节省存储空间和提高搜索效率,搜索引擎在索引页面或处理搜索请求时会自动忽略某些字或词,这些字或词即被称为Stop Words(停用词)。 Stop Words大致为如下三类: 应用十分广泛,在Internet上随处可见的词,比如“Web”一词几乎在每个网站上均会出现
Google # UA "AdsBot-Google (+http://www.google.com/adsbot.html)" # UA "Googlebot-Image/1.0" # UA "Googlebot/2.1 (+http://www.googlebot.com/bot.html)" # UA "Googlebot/Test (+http://www.googlebot.com/bot.html)" # UA "Googlebot/Test" # UA "Mediapartners-Google/2.1 (+http://www.googlebot.com/bot.html)" # UA "Mediapartners-Google/2.1" #