您要查找的是不是：
- The planes formed up over the airfield. 飞机在机场上空排成队列。
- One should not run about aimlessly during an alert. 空袭警报期间不可到处乱跑。
- Guards patrolled the perimeter of the airfield. 卫兵沿机场四周巡逻。
- She is always on the alert for some new calamity. 她总是保持警觉以防某种新的灾难。
- The airfield is bounded by woods on all sides. 飞机场的四周都是树林。
- Keep on the alert; we're due for an inspection. 提防着点，轮到检查我们了。
- Be sure to be watchful or alert. 必须留神，千万要提防。
- The rebellious troops ringed the airfield. 叛军包围了机场。
- 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。
- They have put the army on the alert. 他们已使军队进入戒备状态。
- The alert leopard went up to a deer quietly. 警觉的豹子静悄悄地走近一只鹿。
- An alert listener will have noticed the error. 耳朵尖的人能听出这个错。
- airfield alert 机场待战
- The district was put on red alert during a terrorist bomb scare. 这个地区在得到恐怖主义者轰炸后作了应急准备。
- Alert to circumstances; attentive. 对周围环境敏感的; 留心的
- A large passenger aircraft will land on the airfield. 一架大型民航班机将降落在这个飞机场。
- We must prolong the runway of the airfield. 我们必须加长机场跑道。
- Troops are on the alert against any possible aggression. 军队戒备着可能的来犯。
- One end of the farm is butting on the airfield. 农场的一端与机场相接。
- The boy was alert in answering the stranger's questions. 男孩很机敏地回答了陌生人的问题。
