refrigerating effect per unit swept volume

例句：

1. 1. Therefrigerator is designed to keep food fresh fora long time.
   冰箱的设计是为了长时间保持食物新鲜。
2. 2. The cooling system in the carhelps to maintain a comfortable temperature inside.
   汽车的冷却系统有助于维持车内舒适的温度。
3. 3.The refrigerating effect per unitswept volume is crucial for maintaining food quality.
   单位体积的冷却效果对于保持食品质量至关重要。