emergencyn.突发事件；紧急状态adj.应急的；紧急的；备用的emergency cord(美)(火车上的)紧急停车索emergency duty事故备用,事故时的运行状态emergency cell应急用电池emergency power紧急备用动力emergency phase紧急阶段<警戒阶段emergency light紧急灯,事故照明器,故障信号灯emergency teams紧急救援队emergency braken.紧急制动器；紧急闸；应急刹车emergency rates紧急费率emergency plant应急备用设备