在我们日常生活中和工农业生产中 ,有好多情况下 ,需要安装警示灯或标志灯 ,以提醒人们注意。例如 ,道路施工时 ,需在施工现场挂上红色安全警示灯 ,以确保行人和行车的安全。高层建筑物的顶端按有关的规定必须设置红色警示灯 ,以确保飞机安全飞行。为引起大家注意 ,在一般情况 In our daily life and in industrial and agricultural production, in many cases, warning lights or sign lights need to be installed to remind people of their attention. For example, red road safety lights should be hung on the construction site to ensure the safety of pedestrians and driving. The top of high-rise buildings according to the relevant provisions of the red warning lights must be set to ensure the safe flight of the aircraft. In order to attract everyone's attention, in general