backfield
n. 后卫;守卫区
例句
So I told the third man on our team to center the ball, let the rusher come after me, and go block the tall man defending the backfield to the right.
我于是告诉我们一方的第三个人将球传中,让对方的前锋来追我,然后他去右边挡住那个高个子后卫。