1. spectrum of electromagnetic radiation emitted by a self-luminous source. 
   发光源的电磁放射谱。
2. for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source. 
   用标准声源通过比较测量发光强度来源的仪器。
3. a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions. 
   光通量单位等于一国际烛光照射在距离为一厘米面积为一平方厘米的平面上的光通量。
4. The unit of luminous flux in the International System, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions. 
   流明（光通量单位）国际度量系统中的光通量单位，等于一烛光的均匀点光源在单位主体角内发出的光通量
5. Giving off light; luminous. 
   发光的散发光的；明亮的

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