linebackerKK [ˋlaɪnˏbækɚ] /ˈlaɪnˌbækɚ/發音名詞1線衛美式足球The linebacker tackled the running back just behind the line.那名線衛在防線後方就把跑鋒撲倒了。2線衛位置美式足球He was moved from defensive end to linebacker last season.他上個球季從防守邊鋒被調去打線衛。