关于大象耳朵的功能，我查阅了一个大象的权威网站Elephant Information Repository，它上来是这样描述的：
The ears serve several important functions in the elephant. When a threat is perceived by the elephant, the ears are spread wide on each side of the head, which produces a huge frontal area.
The ear serves a very important function for elephants in regulating its body temperature.
对此，《The Complete Elephant Anatomy》有所描述：As we all know, elephants skin is very wrinkly. These wrinkles have their purpose too. They help the elephant in controlling its body temperature and keeping itself cool. Wrinkles increase the surface area of the skin so when the elephant bathes in water, there is more skin to wet. When the elephant comes out of the water, the cracks and crevices of the wrinkles trap the water and because it takes longer to evaporate in the heat it keeps the elephants skin moist longer than it would if it had smooth skin.