城市轨道交通既有高架线路作为城市交通的重要组成部分，其运营的安全性极为重要。
As elevated urban rail transit line is a component of urban traffic, the safety of its operations is extremely important.
城市轨道交通高架线作为城市轨道交通线路的重要部分，在综合化的城市交通中发挥着重要的作用。
Urban rail transit viaduct line is an important part of the urban rail transit lines, which plays an important role in comprehensive operation of the urban rail transit.
城市轨道交通高架线作为城市轨道交通线路的重要部分，在综合化的城市交通中发挥着重要的作用。
Urban rail transit viaduct line is an important part of the urban rail transit lines, which plays an important role in comprehensive operation of the urban rail transit.
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