[N-COUNT 可数名词]外缘;边缘 The perimeter of an area of land is the whole of its outer edge or boundary.
...the perimeter of the airport...
机场四周
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。
Oxford
per·im·eter/pəˈrɪmɪtə(r); NAmEpəˈrɪmɪtər/noun1the outside edge of an area of land (土地的)外缘,边缘◆Guards patrol the perimeter of the estate.保安人员在庄园四周巡逻。◆a perimeter fence/track/wall围绕四周的栅栏╱小径╱墙2( mathematics 数) the total length of the outside edge of an area or a shape 周长☞compare
1the border around an enclosed area such as a military campperimeter of the perimeter of the airfieldperimeter fence/wall A mine blew a hole in the perimeter wall.► see thesaurus at
edge
2the whole length of the border around an area or shapeperimeter of Calculate the perimeter of the rectangle. →
circumference
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