Some of the highest value materials in solar panels are copper, silver, aluminum, glass, and crystalline silicon.

太阳能电池板中价值最高的材料有铜、银、铝、玻璃和晶体硅。

To manufacture these integrated circuits, the transistors are built up layer by layer, on a pure crystalline silicon wafer.

为了制造这些集成电路，晶体管需要在纯晶体硅片上一层一层地组装起来。

The transistor used to be a big, bulky device, until the invent of the integrated circuit based on pure crystalline silicon wafers.

过去晶体管是一种又大又笨重的器件，直到基于纯晶硅晶片的集成电路的发明后才慢慢改变。