短语词组短语fatalness factors 危险性因素fatalness coefficient 危险性系数potential fatalness 危险性personal fatalness 人身危险性fire fatalness 火灾危险性fatalness assessment 危险性评价fatalness region 危险性区域inherent fatalness 固有危险性social fatalness 社会危险性 返回 fatalness