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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Ductile cast iron as a light type material with fine mechanical properties has been applied more widely in the automobile industry.

作为一种高性能轻型材料，球铁在汽车行业得到了更广泛的应用。

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Calcium sulphate whisker is a new type material.

硫酸钙晶须属于新型材料。

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Each electronic component, he decided, could be made of the same type of material and integrated into a whole.

ECONOMIST: Jack Kilby

Unlike household plastics, which can be recycled through the bring banks, these do not always have a number to indicate the type of material.

BBC: Guernsey States introduces more plastic recycling

The beta launch this week is aimed at getting developers to offer suggestions about what type of material with which they would like to experiment.

BBC: NEWS | Technology | Developers to play with BBC wares