| 单词 | steradian |
| 释义 | steradian【医】 球面度(立体角单位) steradian ste.ra.di.an AHD: [st¹-r³“d¶-…n] D.J. [st!6re!di8*n]K.K. [st!6redi*n]n.Abbr. sr（名词）缩写 srA unit of measure equal to the solid angle subtended at the center of a sphere by an area on the surface of the sphere that is equal to the radius squared:立体弧度：由球心所张成的立体角，它在球面上所截取平面的面积等于以球半径为边长的正方形面积：The total solid angle of a sphere is 4&S{x} steradians.See table at &b{measurement} 球的立体角和为4&S{x}立体弧度参见 measurement语源:1. ste(reo)- ste(reo)-2. radian radian |
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