a computer program that prowls the internet looking for publicly accessible resources that can be added to a database; the database can then be searched with a search engine
例句
用作名词(n.)
I met a wanderer in the street yesterday.我昨天在街上遇见了一个流浪者。
I feel I have come to know this hero,this wanderer.我觉得我有必要认识下这个英雄，这个流浪者。
