| 单词 | jackknife |
| 释义 | jackknife 2 ENTRIES FOUND: plural jackknives plural jackknives Learner's definition of JACKKNIFE [count] 1 2 : a dive in which you bend from the waist and touch your ankles and then straighten out屈体跳水；镰刀式跳水 2 jackknife /ˈʤækˌnaɪf/ verb jackknifes; jackknifed; jackknifing 2 jackknife /ˈʤækˌnaɪf/ verb jackknifes; jackknifed; jackknifing Learner's definition of JACKKNIFE [no object] : to bend in the middle like a folding jackknife especially of a large truck : to have the back part slide out of control toward the front part（大货车失控时驾驶室与后半部车体间）弯折成V形
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