针对我国乳制品中乳糖质量含量的测量准确度偏低、操作复杂的情况，依据光折射理论，提出了牛乳乳糖质量含量的快速高准确度测量方法。
The dioptric method was adopted in this paper for quick and high accuracy determination of lactose content in milk against that of low accuracy and complicated operating in domestic milk industry.
屈光计：用于测量眼睛折射度的仪器。
Dioptometer: an instrument used for measuring ocular refraction.
折射度指示体是晶体的一个新的光性指示体。
The refractivity indicatrix is a new optical indicatrix of crystal.
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