英语翻译One of the major quality aspects of our food supply is i

英语翻译
One of the major quality aspects of our food supply is its content of vitamins and minerals.Nutrition textbooks definevitamins as organic compounds that the body needs in small quantities for normal functioning.Here's the translation:Vitamins are defined as organic materials which must supplied to the human body in small amounts apart from the essential amino acids or fatty acids.Vitamins function as enzyme systems which facilitate the metabolism proteins,carbohydrates and fats but there is growing evidence that their roles in maintaining health may extend yet further.You need only small amounts(that's why they are often referred to as micronutrients)because the body uses them without breaking them down,as happens to carbohydrates and other macronutrients.So far,13 compounds have been classified as vitamins.Vitamins A,D,E,and K,the four fat----soluble vitamins,their absorption by the body depends upon the normal absorption of fat from the diet,tend to accumulate in the body.Vitamin C and the eight B vitamins----biotin,folate,niacin pantothenic acid,riboflavin,thiamin,vitamin B6,and vitamin B12----dissolve in water,so excess amounts are excreted.
Vitamins A does much morethan help you see in the dark.It stimulates the production and activity of white blood cells,takes part in remodeling bone,helps maintain the health of endothelial cells(those lining the body'sinterior surfaces),and regulates cell growth and division.Although it's relatively easy to get too little vitamin A,it's also easy to get too much.Intake of up to 10000IU

一个主要的质量方面我们的食物供应不其内容的维生素和矿物质有机化合物definevitamins营养教科书身体需要少量的正常运作这是翻译:维他命被定义为有机材料必须提供给人体少量除了必需氨基酸或脂肪酸维生素功能服务的酶系统的蛋白质、碳水化合物、脂肪代谢,但越来越多的证据显示,他们的角色另可以延长保持身体健康你只需要少量(这就是为什么它们通常被称为微量元素)使用它们,因为身体打倒他们,就像发生在人类身上碳水化合物和其他macronutrients . 到目前为止,13个化合物已被列为维生素维生素A,维生素D,维生素E和钾、四脂肪——可溶性维生素,他们被身体吸收取决于正常的吸收速度的脂肪,往往从饮食中积累于身体中维生素C和八个B族维生素——素、叶酸、烟酸泛酸,riboflavin、硫胺、维生素B6和维生素B12——溶于水,所以多余的量是质.

维生素A做大量的多次帮助你在黑暗中看见它刺激生产活动的白血细胞,参加重建骨,有利于维护健康的上皮细胞排列(身体表面'sinterior),调节细胞生长和分裂尽管这是比较容易得到极少的维生素A,还可以很容易地得太多10000IU的摄入量