Joel: Sometimes when I'm feeling run down, a little sunlight goes a long way.
乔尔:有时当我觉得很累的时候,一点点阳光就会有很大的帮助。
Plus, Earth's atmosphere bends the sunlight when it's close to the horizon, so the golden orb appears a little higher in the sky than it really is.
另外,当太阳逼近地平线时,地球的大气层会折射太阳光线,这时太阳看起来比其实际高度要高一些。因此,我们所看到的日出要比太阳实际升起的时间早几分钟。
A little over a decade ago, the best photovoltaic efficiency, or sunlight conversion into electricity, was 10 percent, and now it can reach 40 percent.
大约十年前,光电效率(即光能转换成电能的转换率)只有10%,而现在已经能达到40%。
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