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意思解释：（electric incandescent lamp）将灯丝通电加热到白炽状态，利用热辐射发出可见光的电光源。
白炽灯主要由玻壳、灯丝、导线、感柱、灯头等组成。是一种热辐射光源，能量的转换效率很低，只有2%～4%的电能转换为眼睛能够感受到的光。但白炽灯具有显色性好、光谱连续、使用方便等优点，因而仍被广泛应用。
Incandescent lamp is mainly composed of glass shell, filament, wire, sensing column, lamp cap, etc. It is a thermal radiation light source, and the energy conversion efficiency is very low. Only 2%~4% of electric energy is converted into light that can be felt by the eyes. However, incandescent lamps are still widely used because of their good color rendering, continuous spectrum and convenient use.
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