pre-cooling

例句：

1. 1.The refrigerator pre-cools the food before it's served.
   冰箱在食物上桌前进行预冷。
2. 2.The process of pre-cooling is crucial for maintaining the quality of the product.
   预冷过程对于保持产品品质至关重要。
3. 3. During the pre-cooling phase, the temperature of the air inside the chamber drops significantly.
   在预冷阶段，室内空气的温度显著下降。