n.(橄榄球的)中后位
A new or substitute offensive play called by the quarterback or a defensive formation called by a linebacker at the line of scrimmage as an adjustment to the opposing side's formation. 改变打法一种在橄榄球争球线上作为就对方阵势的调整，由四分卫发令的新的或替代进攻打法，或由后卫发令的防守阵势
