spring back; spring away from an impact; "The rubber ball bounced"; "These particles do not resile but they unite after they collide" 後ろに跳ねる。衝撃から跳び離れる。
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【上位】 move forward by leaps and bounds; "The horse bounded across the meadow"; "The child leapt across the puddle"; "Can you jump over the fence?" 飛躍的に前進する。
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