n.周長(zhǎng)；周界；邊緣

Work out how long the perimeter of the playground. 請(qǐng)你算一算體育場(chǎng)的周長(zhǎng)是多少米?

Guards patrolled the perimeter of the airfield. 衛(wèi)兵沿機(jī)場(chǎng)四周巡邏。

A fence marked the perimeter of the field. 一道籬笆標(biāo)明了那塊田地的周界。

The barbed wire fence round the perimeter discouraged intruders. 周圍有鐵絲網(wǎng)阻止了外人闖入。