refrigerating cycle

例句：

1. 1. The refrigerator has a refrigerating cycle that keeps the food fresh.
   冰箱有一个冷藏循环，保持食物新鲜。
2. 2. The engineer designed a new refrigerating cycle to improve efficiency.
   工程师设计了一种新的制冷循环来提高效率。
3. 3. The refrigerating cycle is essential for maintaining the temperature of the food in the freezer.
   制冷循环对于保持冷冻食品的温度至关重要。