case of pump

例句：

1. 1. The pump is essential for the water treatment process.
   泵对于水处理过程至关重要。
2. 2. The pump was damaged during the flood.
   洪水期间泵受损了。
3. 3. The pump was used to circulate the water in the basement.
   泵被用来在地下室循环水。