steradian

常见例句

• steradian(a unit of three-dimensional measure)
  球面度, 立体孤度(一种三维量单位)
• 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。
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