onalarm报警状态oncallfireman兼职消防队员onfire着火onlineretrievalofbibliographicinformationtime-shared文献情报分时联机检索系统ontheair正在电信联络ontheline战斗准备状态onthetrack战斗准备状态on-boardfire飞机〔船on-callfirefighter兼职消防战斗员on-lineretrieval联机检索on-offsystem断续控制系统on-off开关的on-padfire发射坪上着火on-portflame喷口的火焰on-scenefirefighter火场消防战斗员on-sceneinvestigati...
