perimeter [pəˈrɪmɪtɚ]

例句:

• The plane veered off the runway and careered through the perimeter fence.
  飞机突然偏离跑道，高速冲过了周围的护栏。
  
• You can see the perimeter columns bowing into the building.
  来自SA
• By night, the perimeter wire was illumined by lights.
  到了夜里，周遭的铁丝网都被灯光照亮。
  
• Some 300 trees have been ranged along the perimeter hedge.
  沿着绿篱栽种着大约300棵树。
  
• They are not there to provide a perimeter defense.
  来自VOA
• Police set up a perimeter around that boat.
  来自WSJ