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.

ITN, its, itself, ITT, ITV, IUD, ivied, ivory, ivy, Ivy League, J, J, j, jab, jabber, jabot, jack, Jack Frost, Jack tar (also tar), jack-in-office, jack-in-the-box, jack-o-lantern, jack-rabbit, jackal, jackanapes, jackass, jackboot, jackdaw, jacket, jackpot, Jacobean, Jacobite, Jacuzzi, jade, jaded, jag, jagged, jaguar, jail, jalopy, jam,