单词：jackknife
音标：['dʒæknaif] ；
n. 大折合式刀, 屈体跳水
vi. 弯身
vt. 用大折刀切
vi. 弯身
vt. 用大折刀切
n. a dive in which the diver bends to touch the ankles before straightening out
v. dive into the water bending the body at the waist at a right angle, like a jackknife
v. dive into the water bending the body at the waist at a right angle, like a jackknife
词型变化：过去式 : jackknifed ; 现在分词 : jack-knifing ; 第三人称单数 : jack-knifes ; 过去分词 : jack-knifed ; 名词复数形式 : jackknives
词性分布：
jackknife的用法和样例：
例句
用作不及物动词(vi.)
- The results show that the vehicle tends to rollover on the high friction-coefficient road, while the vehicle tends to yaw and jackknife on the low friction-coefficient road.结果表明，重型半挂车辆在附着系数较高的良好路面上容易发生侧倾失稳，而在附着系数较低的湿滑路面上则更容易发生横摆和折叠失稳。
词汇搭配
- jackknife door折门
- jackknife landing position大摺刀落地姿势...
- jackknife sit-up两头翘
- flap jackknife dive坐式屈体跳水...
- jackknife action折叠动作