An exclusively breastfed infant can develop vitamin B12 deficiency if the mother is a vegan.
An exclusively breastfed infant can develop vitamin B12 deficiency if the mother is a vegan.
如果母亲是素食者，则完全母乳喂养的婴儿就可能发生维生素B12缺乏症。
An exclusively breastfed infant can develop vitamin B12 deficiency if the mother is a vegan.
如果母亲是素食者，则完全母乳喂养的婴儿就可能发生维生素B12缺乏症。