perimeters

例句:

• Examples include outdoor perimeters , traffic monitoring, tunnels, and car parks.
  例子像户外围墙; 交通监视; 隧道和停车场.
  
• You change your standards and test perimeters any way suits you.
  来自SA
• Some plants provide escort vehicles for executives when they travel outside the security perimeters.
  来自WSJ
• The perimeters of Indian cities the great engine of its growth are an appalling dystopian vision.
  来自THETIMES