单词backfield
n.: 【足】后场;【足】后场球员网络: 守卫员;外野手;守卫队员
后场(争球线后面的区域):
the area of play behind the line of scrimmage
守卫队员:
the players who play in or around this area
【足】后场球员
any men in the backfield, analyre before you move.
所有的防守队员,行动之前都想清楚了