... 球面角度 = steradian 球面角度 = steradians 球鼠妇属 = armadillidiidae ...
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同义词: sr
以上来源于: WordNet
N an SI unit of solid angle; the angle that, having its vertex in the centre of a sphere, cuts off an area of the surface of the sphere equal to the square of the length of the radius 球面度(立体角国际单位制) ( symbol: sr)
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