perimeter
n. <数>周长; 周围,边界
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。
1. the boundary line or the area immediately inside the boundary
2. a line enclosing a plane areas
3. the size of something as given by the distance around it
Downbelow Station at the crux of the shipping routes, the gateway to Earth's defensive perimeter.
深潜站处于航线的关键位置, 也是通向地球防卫圈的门户.
The circle has greater area than a regular polygon of the same perimeter.
正的面积比同样周长的正多边形的面积大.
Dwarf A: Captain, roots are breaching our perimeter in tunnels F, Q, and V.
队长, 树根正在突破我们在F坑道, Q坑道和V坑道的防线.
Teacher: What is the perimeter of a circle?
师: 什么是圆的周长?
Couldn't I just line the perimeter of my yard with something to keep them at bay?
我不可以只用什么东西在我的院子周围画线来隔绝它们 吗 ?