美日其他研究者也在考虑弃微波、用激光器,穿过大气层将能量传送回地球。
NASA, America s space agency, has started using them to beam energy to remotelycontrolled drones.
美国航天机构国家航空航天局已开始采用激光器传送能源至遥控飞机。
Each stage of converting and transmitting power results in a loss of efficiency, but withtechnological improvements these losses are being reduced.
能量转化、传送的每一个环节都会有一定的功耗,但随着技术的改进,损耗正在降低。
Some of the latest solar cells, for instance, can covert sunlight into electricity with anefficiency of more than 40%. In the 1980s, 20% was thought good.
例如,部分最新型的太阳能电池将阳光转换成电能的功率超过了40%。而在上世纪80年代,20%的功率就很高了。
Whether the Astrium system will remain a specialised novelty or will be the forerunner ofsomething more like the cosmic power stations of Asimov s imagination is anybody s guess.
Astrium 系统将是一个专业用途的创新,还是某个更接近阿西莫夫想象中的太空太阳能电站的先导?一切都还是未知数。
But if it comes to pass at all, it will be an intriguing example, like the geostationarycommunications satellites dreamed up by Asimov s contemporary, Arthur C. Clarke, of themusings of a science-fiction author becoming science fact.
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