单语范例（未经PONS编辑处理）
The energy efficiency of electric lighting has increased radically since the first demonstration of arc lamps and the incandescent light bulb of the 19th century.
en.wikipedia.org The resistance of the light bulb filament (see resistivity article) increases as its temperature increases.
en.wikipedia.org He was placed in a horse stall with one light bulb, and he later remarked that jail was better than this.
en.wikipedia.org The necessary temperature can be provided by a heat mat, ceramic or specific light bulb or other alternative heating systems.
en.wikipedia.org A wire and light bulb may connect the two electrodes.
en.wikipedia.org