A layer of transparent material is sandwiched between the pieces of glass.

【sandwich】一层透明材料夹在玻璃中间。

One is lined with rows of a transparent, conductive material that carry an alternating electric current.

其中一个内衬着一排排透明的导电材料，它们携带交流电。

Each fiber optic cable contains many hair-thin strands, or fibers, of a transparent material. That material is usually glass. But sometimes it's plastic. A single cable may contain only a few fibers. Or it may contain hundreds.

每根光缆都包含许多细如发丝的透明材料股或纤维。该材料通常是玻璃。但有时它是塑料的。一根电缆可能只包含几根光纤。或者它可能包含数百个。