perimeter wall 围墙
perimeter security 周边安全
perimeter fence 外围栅栏
perimeter guard 周边警卫
perimeter defense 周边防御
security perimeter 安全范围
1. The police increased patrols around the city perimeters.
警方加强了城市周边区域的巡逻。
2. Engineers calculated the perimeters of different garden plots.
工程师计算了不同花园地块的周长。
3. The military established strict perimeters around the base.
军方在基地周围建立了严格的安全界限。
4. We need to reinforce the perimeters of the fence for safety.
为了安全，我们需要加固围栏的周边部分。
A: Have you checked the perimeters of the construction site?
A：你检查过建筑工地的周边区域了吗？
B: Yes, we ensured that all perimeters were secure before starting work.
B：是的，我们在开始工作前确保所有周边区域都是安全的。
1) 几何图形的周长
2) 领土或区域的边界线
3) 安全防护的外围范围
4) 军事上的警戒线
1. 周边；外围；边界
2. 周长
e.g.
The perimeter of a square is four times the length of one side.
正方形的周长是边长的四倍。
noun
1. The boundary or outer limit of an area or region.
2. The total length of the edge of a flat shape.
3. The area surrounding a place, especially one that is guarded or protected.
Synonym: boundary, edge, circumference, limit