由于专门用于检索信息的“机器人”程序就象蜘蛛一样在网络间爬来爬去，反反复复，不知疲倦。所以，搜索引擎的“机器人”程序就被称为“蜘蛛”程序。 -Designed to retrieve information as a " robot" program as a spider crawling across the network, and repeatedly, tirelessly. Therefore, the search engine " robot"