Supercapacitors are relatively expensive in terms of cost per watt.
超级电容器是相对昂贵，每瓦成本方面。
The technology is cheap and could lower the cost per watt of solar power.
这种技术成本低廉，可以降低每瓦特太阳能电力输出成本。
According to Kurzweil, "the cost per watt of solar energy is coming down rapidly and the total amount of solar energy is growing exponentially."
据库兹威尔说：“太阳能的每瓦成本正在迅速下降，而太阳能总量正在成倍增长。”
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