单词	jackknife
释义	noun | verb jackknifejackknife1 /ˈdʒæknaɪf/ noun (plural jackknives /-naɪvz/) [countable] 1 a knife with a blade that folds into its handle2a dive in which you bend at the waist in the air and then make your body straight again before you go into the water noun | verb jackknifejackknife2 verb (jackknifed, jackknifing) [intransitive] 1if a large vehicle with two parts jackknifes, the back part swings toward the front part:  A big-rig jackknifed on the highway.2to perform a jackknife dive into water
随便看	aide aide-de-camp AIDS aid worker Aiken, Conrad ail aileron Ailey, Alvin ailing ailment aim aimless aimlessly aimlessness ain't air air bag airball airbase airbed air bladder airborne air brake airbrush air-conditioned

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