A similar, less severe, metabolic disorder is congenital lactase deficiency.
类似的，病症略轻为一点的代谢紊乱疾病是乳糖分解酶素缺乏症。
Characteristic and biological function of lactose, lactase deficiency and solving approach is expounded in this paper.
本文阐述了乳糖的特性、生理功能作用、乳糖酶缺乏症及解决途径。
The positive rate of lactase deficiency test was highest on the second hour when 25g or 12.5g lactose was given, and the difference was significant.
分别摄入乳糖量25克、12.5克，乳糖酶缺乏检出率均在二小时后最高，差异显著；
Lactose intolerance stems from a deficiency of the enzyme lactase, which is needed to help digest lactose, a sugar in milk.
乳糖不耐症的病因是缺乏乳糖酶，这些乳糖酶是消化乳糖的必需物质，牛奶中的糖就属于此类。
Some people have trouble digesting lactose, a carbohydrate in milk and milk products, because of the deficiency of enzyme lactase in the body.
有些人无法消化乳糖，一种在牛奶和奶制品中的碳水化合物，这是因为在他们的身体中缺少乳糖消化酶。
Some people have trouble digesting lactose, a carbohydrate in milk and milk products, because of the deficiency of enzyme lactase in the body.
有些人无法消化乳糖，一种在牛奶和奶制品中的碳水化合物，这是因为在他们的身体中缺少乳糖消化酶。
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