underground heated pipeline

例句：

1. 1. The underground heated pipelineis essential for the city's heatingsystem.
   地下加热管道对于城市的供暖系统至关重要。
2. 2. The construction of this underground heated pipelinewill significantly reduce carbon emissions.
   建造这条地下加热管道将显著减少碳排放。
3. 3. The undergroundheated pipeline was installed to improve energy efficiencyand reduce costs.
   安装地下加热管道是为了提高能源效率并降低成本。