求翻译：结合我国城市轨道交通运营安全特性，以定性分析和定量分析相结合的方法，通过专家咨询，设计了包含内部因素、外部两个一级指标，员工技术水平、设备设施状况和安全管理、乘客素质和极端天气五个二级指标以及二十二个指标的城市轨道交通安全风险评估指标体系。是什么意思？

Combined rail transport operation safety characteristics of urban , qualitative analysis and quantitative analysis methods , through expert consultancy, design containing internal factors , external two -level indicators , level of technical staff , equipment and facilities, health and security mana

In light of China's urban rail transport operations security features, and a qualitative analysis, and quantitative analysis a combination of methods, through expert advice, design the internal factors, and external two-level indicators, employee skill levels, equipment, and facilities and security

Unifies our country city track traffic operation security feature, unifies the method by the qualitative analysis and the quantitative analysis, consulted through the expert, designs has contained internal factor, exterior two level target, the staff technical level, the equipment facility condition

China's urban rail transit security features, based on qualitative and quantitative methods, through expert advice, designs include both internal factors and external level indicator, employee skills, equipment, facilities and safety management quality and extreme weather, passenger five secondary i

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