heat-exchanger thermal ratio

例句：

1. 1.The design of the heat exchanger is crucial for the efficiency of the system.
   热交换器的设计对于系统的效率至关重要。
2. 2.The engineers optimized the heat exchanger to reduce energy consumption.
   工程师们优化了热交换器以减少能源消耗。
3. 3. The thermal ratio of the heat exchanger is a key factor in determining its performance.
   热交换器的热比是决定其性能的关键因素。