当电流——无论是来自光伏电池、风轮机还是其它来源——穿过电极时，钴和磷酸盐会在电极上形成一层薄膜，氧气就生成了。
When electricity, whether from photovoltaic cell, wind turbine or other sources, runs through the electrode, the cobalt and phosphate form a thin film on the electrode and oxygen gas is produced.
互电容 ：一层含有电流的驱动线路。
Mutual capacitance: A layer of driving lines carries current.
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。
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.
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