early warning

early indication (eg by radar) of the approach of enemy aircraft, missiles, etc 预先警报（敌人飞机、 导弹等逼近的预先显示, 如由雷达显示）: [attrib 作定语] early `warning system 预先警报系统.

eagle-eyed, eaglet, ear, ear-ache, ear-drop, ear-drum, ear-muff n, ear-plug, ear-ring, ear-splitting, ear-trumpet, earache, earful, earl, earldom, earliness, early, early and late, early closing, early or late, earmark, earn, earn one's living, earner, earnest, earnestly, earnestness, earning, earnings, earnings-related, earphone, earplug, earring, earrings, earshot, earsplitting, earth, earth science, earthen, earthenware,