For example, consider an airdefenseEarlywarning system. If an unidentified aircraft is spotted, it must be identified immediately.
例如，设想一个防空预警系统，如果一个不明的飞行被标明了位置，就必须立即分辨它。
2
Simulation exercises Haicang District know in advance will be subject to enemy air raids, Haicang District Civil defense command center ordered the sounding of airdefenseearlywarning.