Lifeline systems are infrastructures that maintain modern city 's function or economic function of a district.

生命线工程是维系现代城市功能或区域经济功能的基础性工程设施。

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Lifeline systems are infrastructures that maintain modern city 's function or economic function of a district.

生命线工程是维系现代城市功能或区域经济功能的基础性工程设施。

youdao