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英语翻译英文翻译成中文是关于动物消化和营养需求的内容12:FATS AND FATTYACIDS Dietary fat

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英语翻译
英文翻译成中文是关于动物消化和营养需求的内容
12:FATS AND FATTYACIDS
Dietary fats,mainly derived from animal fats and the seed oils of various plants,provide the most concentrated source of energy in the diet.They supply essential fatty acids that cannot be synthesized in the body and serve as carriers for important fat-soluble vitamins.Fatty acids play a role in cell structure and function.Food fats tend to enhance the taste and texture of the dog*s food as well.
Essential fatty acids are necessary to keep your dog*s skin and coat healthy.Puppies fed ultralow-fat diets develop dry,coarse hair and skin lesions that become increasingly vulnerable to infections.Deficiencies in the so-called *omega-3* family of essential fatty acids may be associated with vision problems and impaired learning ability.Another family of essential fatty acids called *omega-6* has been shown to have important physiologic effects in the body.
13:VITAMINS
Vitamins are organic compounds that take part in a wide range of metabolic activities.Dogs require vitamins in their food,albeit at low concentrations.First noticed in dogs some 75 years ago,vitamin deficiencies can cause a variety of health problems.Clinical signs of vitamin A deficiency,one of the first deficiencies studied in dogs,include motor and vision impairment,skin lesions,respiratory ailments,and increased susceptibility to infections.Dogs fed diets lacking vitamin E show signs of skeletal muscle breakdown,reproductive failure,and retinal degeneration.Thiamin deficiency can lead to brain lesions and other neurological abnormalities if the deprivation is sudden and to heart damage and death if it is chronic.Some vitamins,such as vitamin D,are not only essential in small doses,but also toxic in excess amounts.
14:MINERALS
Twelve minerals in the table are known to be essential nutrients for dogs.Calcium and phosphorus are crucial to strong bones and teeth.Dogs need magnesium,potassium,and sodium for nerve impulse transmission,muscle contraction,and cell signaling.Many minerals that are present only in minute amounts in the body,including selenium,copper,and molybdenum,act as helpers in a wide variety of enzymatic reactions.
Dogs can get too much or too little of a specific mineral in their diets.A deficiency of dietary calcium,for instance,causes a condition known as secondary hyperparathyroidism.Recognized clinically for many years in dogs fed meals consisting mainly of meat,this disease results in major bone loss,skeletal abnormalities,and pathological fractures.An excess of calcium,on the other hand,may also cause skeletal abnormalities,especially in growing large-breed puppies.
谢绝机译\意思表达正确就行
12、脂肪和脂肪酸
食用脂肪主要从动物脂肪和各类植物种子中的油料提取,是饮食中主要的能量来源.每克脂肪所包含的能量是蛋白质和糖类的两倍还要多.食用脂肪提供肌体所不能合成的必须脂肪酸,必须脂肪酸是体内重要的溶脂性维生素的载体.脂肪酸在细胞构建和功能发挥方面起着重要的作用.此外,食用脂肪也可以增进狗粮的品味和质感.
必须脂肪酸是保持狗的皮毛健康所必需的.吃过低脂肪含量食物的小狗,毛发发育得干燥而粗糙,皮肤也会由于损伤而易受感染.缺乏所谓的欧米茄-3系必须脂肪酸,会导致多种神经系统功能紊乱,从视力问题到认知能力受损.另一类名为欧米茄-6的必须脂肪酸,已经展现出对肌体重要的生理作用.
13、维生素
维生素是参与多种代谢活动的有机化合物.缺乏维生素会导致一系列的健康问题.虽然不是那么集中,但是狗依然需要从食物中获取维生素.75年前,人们第一次注意到,缺乏维生素会给狗带来一系列的健康问题.缺乏维生素A的临床症状,是最先在狗身上进行的维生素缺乏情况的研究之一,包括运动原及视觉受损、皮肤损伤、呼吸性疾病及易受感染等.食物中缺少维生素E的狗会表现出骨骼肌肉损伤、生殖能力损伤和视网膜退化等症状.突然间缺乏硫胺会导致大脑受损及其他的神经性官能失调,如果长时间缺乏硫胺,则会导致心脏受损乃至死亡.某些维生素,如维生素D,不仅仅是只能少量使用而已,过量使用还会导致中毒.
14、矿物质
表中的十二种矿物质是狗所必须的营养源.钙和磷对骨骼和牙齿的生长发充至关重要.狗也需要其余矿物质,如镁、钾和钠,来支持神经传导、肌肉收缩及提供细胞信号.许多矿物质在体内的含量非常小,包括硒、铜和钼,它们是大量酶反应的助剂.狗在饮食中摄取的特定矿物质可能会过多也可能会过少.例如缺少钙元素,将会导致继发性甲状旁腺功能亢进症.多年来,在临床方面已经得知,对于主要食用肉类的狗而言,这种疾病会导致严重的骨质疏松、骨骼官能异常及病理性骨折.另一方面,过量的摄入钙,可能也会导致骨骼官能异常,尤其是对成长中的大型狗种的幼崽而言更是如此.