fleetness ['fli:tnɪs]

例句:

• By careful training, English race - horses have come to surpass the parent Arabsin fleetness and size.
  经过严格训练, 英国赛跑马的速率和体格已经超过某亲种阿拉伯马.
  
• Wolf preys on various animals, securing some by craft, some by strength, and some by fleetness.
  狼捕食各种动物, 有的用狡计, 有的用强力, 有的靠捷速.
  
• Can realize with the machine match the fleetness print the word.
  与墨轮机配合可实现快速印字.