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A recent policy discussion in the journal Science compared the nutrient balances of different agriculture systems.
VOA: special.2009.07.28
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They're the magic nutrient books: carbohydrates, fat, whatever it happens to be, that's one theme you could follow.
它们是些神奇的营养学书籍,碳水化合物,脂肪,或者其它东西,都可以成为著书的主题
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And then, you can look at the nutrient broken down as a function of the percent daily values.
下面是各种营养成分的含量,及其所占每日建议摄取量的百分比
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Iron is a vital nutrient, but too much iron can be harmful.
VOA: standard.2010.08.05
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It's also nice, by the way, that there are these electronic programs that immediately figure out the nutrient breakdown of what you're eating.
顺便说一句,好在现在很多的电脑程序,能快速分析出你所吃食物的营养成分
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According to Ben Urbonas, president of the Urban Watersheds Research Institute, these nutrient contaminants tend to be more of a problem in closed water systems,like lakes, where concentrations can build up.
VOA: standard.2010.08.04
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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
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Gives you energy,' okay. Yes, so that would be the nutrient part of it.
提供能量",好的,作为食物需要有营养价值
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And if food is anything you eat, it gives you a nutrient, then basically everything satisfies the criteria for food; not everything in the world, but most things would.
若不论吃什么,只要提供营养就是食物,那基本上没有什么不满足食物的定义,倒不是说一切东西,至少绝大部分都满足
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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
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It used to be case that trained people like dieticians would have to sit down and go through one by one by one and do nutrient analysis, but of course the computer helps with that.
过去那些受过专业训练的人,如营养师,不得不坐下来,一项一项仔细查看,并做营养分析,当然,现在有电脑协助来做这些
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Focusing on one nutrient is a losing proposition, according to some people, but there are others who say that, nope some nutrients prevail over others and are highly important compared to other things that you might be concerned with.
对一些人而言,只关注一种营养的多寡,就像是一宗亏本买卖,是一叶障目的,但还有其他人说,不对,某些营养比其他营养更关键,而且相比其他,营养更应成为需重点考虑的部分
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This particular website has this free nutrient analysis On the website people may choose to get involved in and there may be charges for those things, I don't really know, but there may be and then they may ask you for identifying information, but it's your option to do that.
网站的营养分析服务,在该网站,人们可以选择使用其他服务,当然,那些可能是收费的,我不是很确定,可能有收费服务,并要求验证个人信息,但这由你自己选择
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