An electric light bulb that produces light by heating a filament, usually of tungsten, to a temperature at which yellow or white light is produced.
一种通过灯丝受热而发光的电灯泡，灯丝材料通常是钨，受热达到发出黄色或白色光的温度。
An electric light bulb that produces light by heating a filament, usually of tungsten, to a temperature at which yellow or white light is produced.
一种通过灯丝受热而发光的电灯泡，灯丝材料通常是钨，受热达到发出黄色或白色光的温度。
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