crawler

crawler
noun
  1. a thing that crawls or moves at a slow pace, especially an insect or a slow-moving vehicle
    爬行物;(尤指昆虫或车辆等)缓速前进物
    ■a tractor or other vehicle moving on an endless caterpillar track
    履带拖拉机;履带式车辆
    ■(Computing)a program that searches the World Wide Web, typically in order to create an index of data
    (计算机)机器人;蜘蛛(一种搜索万维网以建立数据库的程序)
  2. (Brit. informal)a person who behaves obsequiously in the hope of advantage or advancement
    (英.,非正式)卑躬屈膝者;谄媚奉承者
英语宝典
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