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大多数鱼类缺乏生物合成维生素C的能力,而且即使某些鱼类能够合成维生素C,合成的数量也不足以满足自身的新陈代谢,所以在饲料的生产中
Most fish lack the capacity for biosynthesis of vitamin C, and even though some fish can synthesize vitamin C, the amount of synthesis is not enough to satisfy their own metabolism, so in the production of feed