| 单词 | jackknife |
| 释义 | nounverbjack·knifeBrE /ˈdʒæknaɪf/ NAmE /ˈdʒæknaɪf/ noun (plural jack·knives BrE /ˈdʒæknaɪvz/ NAmE /ˈdʒæknaɪvz/ ) a large knife with a folding blade 大折刀jack·knifeBrE /ˈdʒæknaɪf/ NAmE /ˈdʒæknaɪf/ verb present simple - I / you / we / they jackknife BrE /ˈdʒæknaɪf/ NAmE /ˈdʒæknaɪf/ present simple - he / she / it jackknifes BrE /ˈdʒæknaɪfs/ NAmE /ˈdʒæknaɪfs/ past simple jackknifed BrE /ˈdʒæknaɪft/ NAmE /ˈdʒæknaɪft/ past participle jackknifed BrE /ˈdʒæknaɪft/ NAmE /ˈdʒæknaɪft/ -ing form jackknifing BrE /ˈdʒæknaɪfɪŋ/ NAmE /ˈdʒæknaɪfɪŋ/ [I ]to form a V -shape . For example if a lorry /truck that is in two parts jackknifes , the driver loses control and the back part moves towards the front part 弯成 V 字形（如铰接货车失控时的弯折） |
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