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Jackknife
01
ジャックナイフダイビング, バタフライダイビング
a dive in which the diver bends to touch the ankles before straightening out
02
折りたたみナイフ, ジャックナイフ
a large knife with one or more folding blades
to jackknife
01
逆さになる, 慣習に反する
contrary to rule or accepted order or general practice
02
ナイフのように飛び込む, ナイフ状に水に飛び込む
dive into the water bending the body at the waist at a right angle, like a jackknife
03
ジャックナイフになる, 折りたたまれる
(of articulated vehicles such as tractor trailer) to experience a loss of control where the front and rear parts of the vehicle fold together
jack
knife
jackknife
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