两个防守前卫之一，位置在争球线一段短距离之后，相对来讲靠近边界线。
Either of two defensive halfbacks stationed a short distance behind the linebackers and relatively near the sidelines.
两个防守前卫之一，位置在争球线一段短距离之后，相对来讲靠近边界线。
Either of two defensive halfbacks stationed a short distance behind the linebackers and relatively near the sidelines.
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