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.
量单位等于国际烛射在距离厘米面积方厘米的面上的量。
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.
量单位等于国际烛射在距离厘米面积方厘米的面上的量。
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