jackknifed
v.
对折，用折叠刀切( jackknife的过去式和过去分词 );
例句:
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He jackknifed on the sofa beside the Christmas tree.
他弯腰地坐在圣诞树旁的沙发上.
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There's enough light to lift the duvet and be able to see that my legs have jackknifed, the knees crossed, the hamstrings taut.
来自THETIMES