求翻译：二、开暖风。将空调调至外循环，打开暖风，出风口对准前风挡。这种方法的弊端是要等水温上升之后才会起作用，并且其他没有被出风口直吹的车窗依旧会雾气重重。是什么意思？

Second, open heater. Air conditioning will be transferred to outside the circle to open the heater outlet at the front windshield. The drawbacks of this method is to water temperature increases will work, and the other outlet blowing straight windows still will be heavy fog.

2, the warm air. The air conditioner to the outer loop, warm, open air align front windshield. This method has the disadvantage, only after water temperature rise will play a role, and the other