secondary heat pump

例句：

1. 1. The secondaryheat pump is an efficient way to heata building.
   二次热泵是一种高效加热建筑物的方法。
2. 2. The new secondary heat pump hassignificantly improved energy efficiency.
   新型二次热泵显著提高了能源效率。
3. 3. The secondary heat pumpsystem is designed to reduce energy consumption inindustrial processes.
   二次热泵系统旨在降低工业过程中的能源消耗。