emergencyn.突发事件；紧急状态adj.应急的；紧急的；备用的emergency stair疏散楼梯Emergency calls急诊emergency alert紧急报警emergency basin备用池emergencyrescue应急救援emergency width呼救信号脉冲宽度emergency shaft备用井emergency close[计] 紧急关闭emergency-off应急断电emergency talks紧急会议