2 solar power system可以指代太阳能发电系统 但不能等同于光伏发电系统 pv system 因为solar power system不但包含photo voltaic 光伏发电 还应该包含solar thermal 光热发电 两者是真子集的关系. Solar radiation along with secondary solar powered resources such as wind and wave power hydroelectricity and biomass account for most of the available renewable energy on earth.