emergency fan事故风扇emergencyn.突发事件；紧急状态adj.应急的；紧急的；备用的emergency action team紧急行动队emergency maintenance故障排除,应急维修emergency tracheotomy紧急气管切开术emergency information紧急通告emergency legislation[法] 紧急立法emergency import curb紧急进口限制emergency illuminance应急照明emergency shut-down紧急停堆Emergency dispatching应急指挥Emergency Power Level应急功率级