backfield

noun

1. 后场（争球线后面的区域）
   the area of play behind the line of scrimmage
2. 守卫队员
   the players who play in or around this area

1. The position of the football player in the backfield who directs the offensive play of his team.
   足球队中处在后场直接指挥进攻的队员的位置。

noun

1. the offensive football players who line up behind the linemen