shifting pump

例句：

1. 1.The shifting pump is used to move water from one area to another.
   移动泵用于将水从一个区域移动到另一个区域。
2. 2.The shifting pump was installed in the basement to help with the flood relief efforts.
   移动泵被安装在地下室以帮助进行洪水救援工作。
3. 3.The shifting pump has been a lifesaver during the recent heavy rains.
   移动泵在最近的大雨中起到了救生的作用。