utility unit

例句：

1. 1. The new building has a large utility unit in the basement.
   这座新楼的地下室有一个大型的实用单元。
2. 2.The utility unit is designed to provide power and heat for the entire house.
   这个实用单元设计用来为整个房子提供电力和暖气。
3. 3.The utility unit is easy to install and can be used for many different purposes.
   这个实用单元安装简便，可以用于多种用途。