在中国科技馆展览大厅里,一辆精制的小车在光照下运行自如,一旦光照停止小车便停止运行。这就是光电池车,光是它惟一的能源。 在太阳内部发生着核反应,温度高达1500万度,辐射出大量的热能。传到地球外大气层的太阳辐射能量相当于人类一 In the exhibition hall of China Science and Technology Museum, a refined car runs freely under the light and stops once the light stops the car. This is the battery car, just its only source of energy. A nuclear reaction takes place inside the sun at temperatures up to 15 million degrees, radiating a great deal of heat. The amount of solar radiation that reaches the atmosphere outside Earth equals human one