The fundamental objectives of bridge design are safety, serviceability, economy and elegance, and the safety is the foundation and premise for the other three ones.
桥梁结构的设计准则是“安全、适用、经济、美观”，而桥梁结构的安全性则是另外三个准则的前提和基础。
The fundamental objectives of bridge design are safety, serviceability, economy and elegance, and the safety is the foundation and premise for the other three ones.
桥梁结构的设计准则是“安全、适用、经济、美观”，而桥梁结构的安全性则是另外三个准则的前提和基础。
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