semi-perimeter

常见例句

• Guards patrolled the perimeter of the airfield.
  卫兵沿机场四周巡逻。
• semi perimeter
  n. 半周长
• The perimeter of the airfield is protected by guard-dogs.
  机场外的环形防卫圈由警犬保卫着。
• The barbed wire fence round the perimeter discouraged intruders.
  周围有铁丝网阻止了外人闯入。
• Guards had been posted at several points around the perimeter.
  在环形防线上已布置了几处岗哨。
• A fence marked the perimeter of the field.
  一道篱笆标明了那块田地的周界。
返回 semi-perimeter