Therefore, the angle of observation environment, observation, specular reflection, or diffuse reflectance, observing business card printing and membership card making products brings a lot of problems.
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or diffuse reflectance
或者漫反射
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This sphere serves as a diffuse light source, which enables measurements of the hemispherical reflectance, or the directional absorptance, respectively.
这个球作为扩散光源，使测量的半球形或定向吸收率的反射系数，分别使用。
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