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1. Oxford American Dictionary

   crawler

   • IPA[ˈkrôlər]

   美式

   • n.
     a thing that crawls or moves at a slow pace, especially an insect；a tractor or other vehicle moving on an endless caterpillar track

   • noun: crawler, plural noun: crawlers

2. • 釋義

   n.

   名詞

   • 1. a thing that crawls or moves at a slow pace, especially an insect the light bulb was a magnet for moths and many-legged crawlers
   • ▪ a tractor or other vehicle moving on an endless caterpillar track the crawlers move space shuttles to the launch pads a crawler excavator
   • 2. a program that systematically browses the World Wide Web in order to create an index of data.