1. 网络搜索器，网络爬虫(借用户上网之际收集信息的计算机程序)
    A crawler is a computer program that visits websites and collects information when you do an Internet search.

1. terrestrial worm that burrows into and helps aerate soil
    often surfaces when the ground is cool or wet
    used as bait by anglers

    Synonym: earthwormanglewormfishwormfishing wormwigglernightwalkernightcrawlerdew wormred worm

2. a person who crawls or creeps along the ground

    Synonym: creeper

3. a person who tries to please someone in order to gain a personal advantage

    Synonym: sycophanttoadylackeyass-kisser