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体积 /体积
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按体积
计运费
by volume
按体积
计运费
by measurement
物体的亮度或发光率定义为物体面积发射到单位立体角内的光通量
The brightness or luminance of an object is defined as the luminous flux emitted per unit area of the object into unit solid angle
超大体积
oversize
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