perimeter

英 [pəˈrɪmɪtə(r)]

美 [pəˈrɪmɪtər]

n.  (土地的)外缘，边缘; 周长

复数：perimeters　

CET6TOEFLIELTSGRETEM8医学

Collins.1 / BNC.8620 / COCA.6584

牛津词典

noun

• （土地的）外缘，边缘
  the outside edge of an area of land
  1. Guards patrol the perimeter of the estate.
     保安人员在庄园四周巡逻。
  2. a perimeter fence/track/wall
     围绕四周的栅栏 / 小径 / 墙
• 周长
  the total length of the outside edge of an area or a shape

柯林斯词典

• N-COUNT 外缘；边缘
  Theperimeterof an area of land is the whole of its outer edge or boundary.
  1. ...the perimeter of the airport...
     机场四周
  2. Officers dressed in riot gear are surrounding the perimeter fence.
     身穿防暴服的警察正在包围外围的栅栏。

英英释义

noun

• the size of something as given by the distance around it
  Synonym:circumference
• a line enclosing a plane areas
• the boundary line or the area immediately inside the boundary
  Synonym:marginborder

双语例句

• Refer to the area crossing the perimeter palisades or limited by the white stake.
  指越过周边栅栏或被白色的立桩限定的区域。
• To further understand the concept of a circle, distinguish the perimeter and the area of a circle.
  进一步熟记圆的概念，区分圆的周长和面积。
• These outdoor luminaires were designed for perimeter security illumination and also incorporate occupancy sensors to properly manage energy usage.
  这些户外照明专门为边界安全照明设计，和传感器一起实现妥善地管理能源使用。
• Staff withdrew from the main part of the prison but secured the perimeter
  工作人员从监狱的主要区域撤出，但外围仍派人守卫。
• A fence marked the perimeter of the field.
  一道篱笆标明了那块田地的周界。
• An organization's perimeter defense devices would be overwhelmed by a large attack.
  一个机构的周边防御设备会被大型攻击淹没。
• 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。
• We have established a perimeter around the airport.
  我们在机场附近设好了防线。
• Some 300 trees have been ranged along the perimeter hedge
  沿着绿篱栽种着大约300棵树。
• Bill, I need you to set up a perimeter around his house.
  比尔，我要你在他家附近设置警戒圈。