As we mentioned in one of the earlier classes, these macronutrients differ in how much energy you can derive from them.
我在之前一节课提过,身体从不同大量营养素中吸收的能量不同
Nutrients get broken down into several classes and these are the constituents of food that your body uses for one purpose or another.
营养素这个问题需要花几节课来讨论,它们是食物的组成要素,供给身体吸收,支持身体机能运转
But in some parts of the class the distinction between nutrients and food is made quite distinct.
但是在我们的某些课程中,营养素与食物之间有明确的分水岭
Well, both are foods, depending on your definition, but both are foods. Both have nutrients, both have things your body can make use of.
根据普遍的定义,两种都是食物,都是食物,都有营养素,都含有人类身体可吸收利用的物质
The micronutrients, which are available in food but in smaller amounts, are vitamins, minerals, and water.
微量营养素,在膳食中所占比重较小,它们是维生素,矿物质和水
And so the food is a broader constituent of what we consume; the nutrient will be the pieces of the food that affect bodily function.
所以食物的概念要比吃的东西更加广泛,食物中的营养素影响着我们的人体机能
The macro nutrients are the big constituents of food, that's protein, carbohydrate, and fat.
大量营养素是食物重要组成来源,即蛋白质,碳水化合物和脂肪
The macronutrients, protein, carbohydrate and fat; the micronutrients vitamins, minerals and water.
大量营养素,蛋白质,碳水化合物和脂肪,微量营养素,维生素,矿物质和水
There are macronutrients and micronutrients and you've heard of both.
可以分为大量营养素和微量营养素两类
A nutrient is considered a substance within the food, that's when it digests it, absorbs, promotes some bodily function, so that it has some metabolic health value when people consume it.
营养素是包含在食物中的物质,由人体消化,吸收,推动身体机能,食品必须具有值得人类去代谢的健康价值
Then we'll talk about macro and micro nutrients.
还会谈到大量营养素及微量营养素
So nutrition is really what people are eating; and that overlaps with the concept of diet, which is when people are making specific choices about what to eat, how do they partition their nutrients.
营养学研究的是人们吃的东西,及其与饮食概念的交叉学科,也就是人们决定吃什么之后,如何区分其中的营养素
Now, let's talk about nutrients.
现在,让我们讨论下营养素
There are other things that would qualify as food, but the not too much of course has to do with over-- intake of certain nutrients, the calories; and then eating mostly plants tends to be a pretty good idea.
辣奇多绝对不能算作食物,至于"适量饮食"则应参考,某些营养素及热量的摄入量,而"植物为主"是一条非常好的建议
But if you have enough energy, or you have too much energy stored in your body and body fat, then the brownie's not such a good idea because it provides too much, and of course not nearly the nutrients that the broccoli would provide.
但如果你的身体能量充沛,或者能量过多,体态肥胖,那么布朗尼提供过多热量,不是首选,提供的营养素也不及花椰菜
And so these are the things people care about a lot and they're the ones that popular diet books are built around almost exclusively: that you should eat low fat, you should eat low carbs, high fat, they're all kinds of permutations of these that exist out there.
所以大量营养素是人们所关注的,它们也是,现在流行的饮食书籍所围绕的话题,类似人们应该吃的低脂或者应该低碳高脂,各种各样的说法都有
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