heating in salt bath furnace

例句：

1. 1.The oven is heating up the food.
   烤箱正在加热食物。
2. 2.The car's heater is on full blast.
   汽车的暖气开到最大了。
3. 3.The fire in the fireplace is heating up the room.
   壁炉里的火正在加热房间。