semi-perimeter

常見例句

Guards patrolled the perimeter of the airfield.
衛(wèi)兵沿機(jī)場四周巡邏。
semi perimeter
n. 半周長
The perimeter of the airfield is protected by guard-dogs.
機(jī)場外的環(huán)形防衛(wèi)圈由警犬保衛(wèi)著。
The barbed wire fence round the perimeter discouraged intruders.
周圍有鐵絲網(wǎng)阻止了外人闖入。
Guards had been posted at several points around the perimeter.
在環(huán)形防線上已布置了幾處崗哨。
A fence marked the perimeter of the field.
一道籬笆標(biāo)明了那塊田地的周界。