water boiler

例句：

1. 1. The new waterboiler is much more efficient than the oldone.
   新的水锅炉比旧的更高效。
2. 2. The engineers were busy installing thenew water boiler in the factory.
   工程师们忙于在工厂安装新的水锅炉。
3. 3. Thewater boiler was used to heat the entirebuilding during winter.
   水锅炉用于在冬天加热整个建筑。