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jack knife的英文翻譯是什么意思，詞典釋義與在線(xiàn)翻譯：
英英釋義
名詞 jackknife:
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a large knife with one or more folding blades
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a dive in which the diver bends to touch the ankles before straightening out
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dive into the water bending the body at the waist at a right angle, like a jackknife
