剑桥词典If a truck that has two parts jackknifes, one part moves around so far towards the other part that it cannot be driven . 弯成V字形（如铰接货车的弯折） The oil tanker jackknifed after skidding on the ice . 油罐车在冰上打滑，绞接的车身之间发生了弯折。 返回 jackknife