桥梁是交通生命线系统中的重要枢纽结构。
Bridges are the most seismically vulnerable structures in a highway system.
桥梁是交通生命线系统中的重要枢纽工程。
Bridges are the most important structures in a highway system.
一个城市或地区的承灾能力主要看其基础设施的承灾能力，其中最重要的一个部分就是生命线系统的承灾能力。
The disaster bearing capability of a city or region mainly focuses on the infrastructure, and the most important part of which is the lifeline system.
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