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Outbreaks are due to low immunization coverage, malnutrition, and vitamin A deficiency.
麻疹的发生与疫苗接种的普及率低, 营养不良及维生素A缺乏症有关.
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Effects of vitamin A deficiency on the development and growth of rat embryos were studied.
本文观察了维生素A缺乏对大鼠胚胎生长发育的影响.
Vitamin A deficiency is the most common cause of blindness in young children.
维生素A缺乏是造成幼儿视盲最常见的原因.
维生素A缺乏病???
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