zonal defence的用法和樣例：
例句
- Liverpool boss Rafa Benitez has defended his much-maligned policy of using zonal marking when defending set-pieces.
利物浦主帥貝尼特斯捍衛他的一直飽受詬病採用區域防守戰術防守對方定位球進攻。 - A Sweeper was originally used to back up man-to-man defences.However, a Sweeper can also be used with a zonal marking system.
雖然以前清道夫是用來補充人盯人防守體系的，但是清道夫也可以使用在區域防守體系中。
