即使性能最好的窗户散失的热量也是同样面积墙的10倍。
Even the highest performance Windows lose 10 times the heat energy of the equivalent area of wall.
举个例子来说，假如住宅的窗户没有进行恰当的隔热处理，或是不能在防止热量散失的同时阻挡紫外线，利用太阳电池板取暖的效力就会大大减弱。
For example, heating a home using solar panels becomes much less effective if the Windows in the house are not properly insulated or treated to keep the heat in and the UV rays out.
如果水是凉的，而空气是暖的，并伴有太阳，此时花费较长的时间入水是可以的，因为你的身体没有散失热量。
If the water is cold but the air is warm, and sun is shining, it's OK to take longer getting in since your body's not losing heat.
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