steradian

常见例句

• steradian(a unit of three-dimensional measure)
  球麪度, 立躰孤度(一種三維量單位)
• 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.
  光通量單位等於一國際燭光照射在距離爲一厘米麪積爲一平方厘米的平麪上的光通量。
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