Semiconducting describes a material that lets electric current through, but not as freely as a metal does. Silicon is the famous example. Picture three kinds of stuff: a conductor (copper) lets charge race along; an insulator (rubber) almost refuses; a semiconducting material sits in the middle. Though actually the useful secret is not “it is half as good as a wire”. It is that we can change how well it conducts — by mixing in tiny amounts of other atoms, or by applying voltage — so a chip can switch current on and off. That is why phones, computers, and solar cells are built from it. You will see the adjective on films, layers, and lab notes: a semiconducting layer. In everyday talk people reach for the noun instead: semiconductor. This is industry and science language, not kitchen language.

半導體的（形容材料性質；日常較常直接說「半導體」）