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Vitamin D is an essential nutrient that we get through exposure to sunlight and through diet. Without enough Vitamin D, we are at risk for rickets, osteoporosis and bone fractures. Now, researchers have found that Vitamin D deficiency is also associa
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Consider starch and fiber, both polysaccharides, both derived from plants, 拿淀粉和纤维来说，它们都是多糖，都是从植物中获得的， both composed of hundreds to thousands of monosaccharides joined together, 也都由成百上千个
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