radiator fan

例句：

1. 1. The car's heater fan is on, so it feels warm and cozy inside.
   汽车的加热风扇打开了，所以车里感觉温暖舒适。
2. 2. The radiator fan helps to cool down the engine during hot weather.
   散热器风扇在炎热天气中帮助冷却发动机。
3. 3. The radiator fan is a crucial component of the car's cooling system.
   散热器风扇是汽车冷却系统的关键部件。