n. 大折刀
vt. 用大折刀切/戳
vi. 弯身, (分节连接的车辆在打滑时)中间突然弯折失控
在线英汉词典

jack-knife的短语、例句：

jack-knife n pl -knives 1 large pocket-knife with a folding blade （可放衣袋内的）大摺刀. 2 (sport 体) dive in which the body is first bent double and then straightened 屈体跳水. jack-knife v [I] (esp of an articulated lorry) bend sharply in the middle into a V-shape, usu as the result of an accident （尤指铰接的货车）弯成V字形（通常因交通事故所致）
A heavy lorry has jack-knifed on the motorway, causing long delays. 一辆重型铰接货车在高速公路上撞成V字形, 耽搁了很长时间.