perimeter defence system
外围防护系统
airport perimeter fencing.
机场周边围网
perimeter acquisition radar.
环视搜索雷达
set guards around the perimeter.
派守卫于防御带周围
deflectable deposited perimeter air.
偏置周界风
barbed wired coils on perimeter fences
铁丝网刺钩
perimeter state of The South China Sea.
南海周边国家
Teacher What is the perimeter of a circle.
师什么是圆的周长
Guards patrol the perimeter of the estate.
保安人员在庄园四周巡逻。
A fence marked the perimeter of the field.
一道篱笆标明了那块田地的周界。
After that I opened the East perimeter fence.
之后，我打开了东面的围墙。
Guards patrolled the perimeter of the airfield.
卫兵沿机场四周巡逻。
We have to detain everybody inside this perimeter.
我们授命拘捕警戒线内的所有人。
The river marks the eastern perimeter of our land.
这条河标示我们的土地东面的边界。
We have established a perimeter around the airport.
我们在机场附近设好了防线。
I saw at least three armed guards on the perimeter.
我看到至少有三个全副武装的守卫在外围。
He lacks a lot of accuracy with his perimeter stroke
他外线投篮很不准,
The perimeter is surrounded by an electrified fence.
围墙上配有电网。
A river runs along one side of the field's perimeter.
河沿着田的一边流。
Properties of Perimeter Bisection Chords of Triangles
三角形周长平分弦的特性
By night, the perimeter wire was illumined by lights.
到了夜里，周遭的铁丝网都被灯光照亮。
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