电烧伤
电烧伤
每年,美国都会产生12万亿加仑的污水,并耗费21万亿千瓦时的电力将这些污水净化到饮用水的标准。
What they are: Images are created when electricity passes through liquid crystals, a process that prevents screen burn (a problem with plasmas) and also reduces waste heat.工作原理:电流穿过液晶产生图像,这个过程可以避免屏幕烧屏(等离子体电视就有这个问题),也减少热量排放。
People have to pay, of course, for the electricity they use and the gas they burn to keep their homes at just the right temperature.通过燃烧气体加热和电力降温使空气调整至合适的温度,这当然是要付费的。