您要查找的是不是：
- Guards patrolled the perimeter of the airfield. 卫兵沿机场四周巡逻。
- 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。
- Oxygen enters into many compound bodies. 氧是许多化合物的组成部分。
- Guards had been posted at several points around the perimeter. 在环形防线上已布置了几处岗哨。
- Air is a mixture, not a compound of gases. 空气是气体的混合物，不是化合物。
- Rose is a plant with compound leaves. 玫瑰是复叶植物。
- "Broad-shouldered" is a compound word. "Broad-shouldered"是个复合字。
- Common salt is a compound of sodium and chlorine. 食盐是钠和氯的化合物。
- My friend's family lives in the compound. 我朋友的家住在那个大院里。
- A fence marked the perimeter of the field. 一道篱笆标明了那块田地的周界。
- A chemical compound consisting of such molecules. 二聚化合物这种聚合物形成化合物
- compound perimeter 复合视野计
- The plane stalled, flipped over onto its back and crashed near the perimeter. 飞机失速了，翻了一个跟头，坠毁在机场环形围栏附近。
- How am I to find the perimeter in the dark? 我在黑暗里怎么看出周围的警戒线呢?
- An organic compound containing many double bonds. 多烯一种包含许多双键的有机化合物
- Work out how long the perimeter of the playground. 请你算一算体育场的周长是多少米?
- Guards patrol the perimeter of the estate. 保安人员在庄园四周巡逻。
- We might nab him if we set up a perimeter. 只要我们设个防线或许能逮捕到他。
- A medicinal compound formerly used as an antidote for poison. 解毒剂一种药物复合剂，以前用于解毒
