crawler [ˈkrɔlɚ]

例句:

• The pool is divided into three sections with a crawler lane for beginners.
  泳池分三部分，有为初学者而设的慢泳道。
  
• The launcher and vehicle are then transported to the firing pad by a crawler.
  发射器和飞行器由一个爬行轨道送到点火台.
  
• Then the launcher and vehicle are transported to the firing pad by a crawler.
  然后,发射器和飞行器由一个爬行轨道送到点火台.
  
• The Dark Crawler shows just how varied a grime album can actually be.
  来自BBC
• These crawler bots are used primarily to inspect confined spaces such as pipes and sewers.
  来自SA
• If it looks like a ground crawler like pumpkin, courgette, or watermelon, just leave it.
  来自WSJ