crawler

名词 crawler:

1. a person who tries to please someone in order to gain a personal advantage
   同义词：sycophant, toady, lackey
2. a person who crawls or creeps along the ground
   同义词：creeper
3. terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers
   同义词：earthworm, angleworm, fishworm, fishing worm, wiggler, nightwalker, nightcrawler, dew worm, red worm

crawl.er

n.（名词）
One that crawls, especially an early form of certain insect larvae.
爬行动物：爬行的东西，尤指某些昆虫幼虫的早期形体
A vehicle, such as a bulldozer, that moves on continuous belts of metal plates.
履带式车辆：推土机之类的在延续的金属履带上移动的车辆