According to the theory of indirect evaporative cooler, heat can be taken away through water evaporation by wrapping water absorbent film on the cooling surface of air conditioner condenser.
应用间接蒸发散热的原理，在空调冷凝器表面包覆吸水膜，利用水蒸发带走热量。
On the contrary, in the nighttime, the air near the surface is cooler and sound waves are refracted to the earth surface (Fig. 2).
相反在夜间时分，接近地面的空气较冷，声波便会被折射向地面（图二）。
On the contrary, in the nighttime, the air near the surface is cooler and sound waves are refracted to the earth surface (Fig. 2).
相反在夜间时分，接近地面的空气较冷，声波便会被折射向地面（图二）。
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