When the sun goes down the solar trees will return to their original position to give off a full spectrum of light to the street and pedestrians below.

日落后“太阳树”会回复到最初的位置，发出全光谱光线，为下面的街道和行人提供照明。

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In 2010 they will return, or so say most solar scientists.

大部分太阳学家认为，到2010年，黑子们会“归去来”。

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An external circuit provides a path for the electrons to return to the p-type material, producing an electric current along the way that continues as long as light strikes the solar cell.

此时接上一条外线电路，电子便通过线路流动到p层。只要光束持续地撞击太阳能电池，就会有持续的电流。

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Then,in two thousand eleven, the Solar Decathlon will return to Washington.

VOA: special.2009.10.27

The report puts the year the leading solar manufacturers will return to positive margins at 2014.

FORBES: How to Play the Solar Revival

Going solar accelerates the return on investment for drivers of cars like the Honda Fit EV, the electric version of its popular subcompact, and owners also get to zero out their carbon emissions by fueling from the sun.

FORBES: Honda, SolarCity Sign $65 Million Deal To Help Drivers Go Solar

The most important thing for an investor trying to get in on the solar bottom to know is not the most efficient manufacturers today, but the most efficient when the market begins to revive, and when solar manufacturers will return to profitability.

FORBES: How to Play the Solar Revival