jackknife
英[?d??kna?f]
美[?d??k?na?f]
柯林斯高阶英汉双解学习词典释义
英英词典释义
Noun
1. a large knife with one or more folding blades
2. a dive in which the diver bends to touch the ankles before straightening out
Verb
1. dive into the water bending the body at the waist at a right angle, like a jackknife
行业词典
体育： 折叠式撑杆跳高；屈体；折体动作；
数学： 刀切法；