If a squad is moving through the desert, for example, a drone aircraft might fly ahead of the soldiers and send back pictures of enemy troops lying in wait.

• 举例来说，如果一个小队正在沙漠中前进，一架无人机会飞在士兵们前面，向他们发来隐蔽着等待伏击他们的敌军部队的图片。