jackknife

jackknifejackknifeD.J.:[ˈdʒæknaif]K.K.:[ˈdʒækˌnaɪf]n.1.■折叠刀v.1.■对折,用折叠刀切

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jackknife['dʒæknaif]n.1.■(随身携带的)大折刀2.■【体育】屈体跳水，镰刀式跳水；屈体3.■(制动时牵引车与单挂车意外发生的)弯折现象4.■【戏剧】转台5.■【统计学】刀切法，折刀法vt.1.■用大折刀切2.■把…(折刀似的)折拢；使弯折：He jackknifed his body into the driver's seat.他曲着身子坐到了驾驶员位置上。vi.1.■(折刀似的)折拢2.■做屈体跳水3.■(铰接车辆)转弯(成小于90度角)adj.1.■折刀似的；折刀似启闭(转动)的2.■屈体的；屈体跳水的3.■弯折的变形n.jackknives变形vt.jackknifedjackknifing

jackknifejackknife[ˈdʒæknaif]n.1.■(防守队员抢篮板球的)折体动作; 折叠式撑竿跳高; 背摔, 屈体2.■水手刀, 折刀