jackknife [ˈdʒækˌnaɪf]

例句:

• "Normal" than the sound of a Delta bluesman applying a jackknife or bottleneck to guitar strings.
  来自BBC
• Yes, simple ones like the swallow and jackknife but not fancy diving.
  跳的, 跳简单的例如燕式、弯身式,但不会跳花式.
  
• But, yahoo still is put in jackknife government issue.
  但是, 雅虎仍存在重叠管理问题.
  
• Two periodic jackknife, be helpful for national economy growing quickly continuously.
  两个周期的重叠, 有利于国民经济持续快速增长.
  
• He broke up the ground on the grave a little with his jackknife.
  来自NEWYORKER