太阳能电池板的发射器将阳光转化为电能。

The ___emitter in the solar panel converts sunlight into electricity.

这家工厂是空气污染的主要排放源。

This factory is the main ___emitter of air pollution in the area.

在晶体管中，载流子从发射极流向基极。

In a transistor, charge carriers move from the ___emitter to the base.