There are nano-engineered designs, which at least have been analyzed theoretically, that show the potential to be very lightweight, very inexpensive, very efficient, and we'd be able to actually provide all of our energy needs in this renewable way.
不过现在有纳米工程设计的太阳板， 它们从理论分析上来说 可以变得很轻 很便宜，且效率很高。 而且我们将可以用这种可再生的方法提供我们所需的能量。