Biologists have long debated about whether egg production in birds is biologically highly costly, some theorizing that egg production is energetically or nutritionally demanding.
长期以来，生物学家一直在争论鸟类的产蛋在生物学上是否具有很高的成本，有的理论认为产蛋对能量或营养的要求很高。
One intervention, consumption of a low-calorie yet nutritionally balanced diet, works incredibly well in a broad range of animals, increasing longevity and prolonging good health.
有一种干预方法，即食用低热量但营养均衡的饮食，在很多动物身上都取得了令人难以置信的效果，它能延长寿命、维持身体健康。
Sandy soils are prone to the leaching of nutrients and minerals and so tend to be nutritionally poor.
养分和矿物质容易从沙质土壤中流失，因此沙质土壤往往较为贫瘠。
For example, the claim that breakfast cereal has a health benefit may be accompanied by the disclaimer "when part of a nutritionally balanced breakfast".
例如，宣称早餐麦片对健康有益的广告可能还会附带一个免责声明，即“当它是营养均衡早餐的一部分时”。
So what else is in "seasoned beef," nutritionally speaking?
那么，从营养角度看，“调味牛肉”里究竟还有什么？
Is it hype? Or is it nutritionally meaningful? Perhaps some of both.
这究竟是炒作，还是真有营养学上的好处？也许兼而有之。
Though garlic is a nutritionally endowed food, it is only consumed in small amounts.
虽然大蒜是有营养的食物，可它只能少量食用。
The protein, fat and mineral of oat are nutritionally superior to those of other cereals.
燕麦的蛋白质、脂肪、矿物质含量高于其他谷物。
These recipes offer other benefits: They're nutritionally sound and environmentally friendly.
这些菜还提供了其他好处：营养丰富且绿色环保。
First they fed on seals, which were the easiest to catch and the most nutritionally valuable.
她们先捕食的是最容易捕捉且最有营养价值的海豹。
The elderly patients admitted with hip fractures are likely to be more nutritionally deprived.
患有股骨头骨折的住院老年病人更易缺乏营养。
The only nutritionally complete and safe goat infant formula in New Zealand. Suitable from birth.
新西兰唯一营养齐备食用安全的婴儿羊奶配方奶。适合初生婴儿。
Although the proteins of wheat flour are superior for making bread, nutritionally they are incomplete.
尽管小麦面粉中的蛋白质就制作面包而论有它优越的地方，但营养方面不完全。
Unlike peanuts and almonds, walnuts are usually eaten raw, making them even more nutritionally superior.
和花生、杏仁不同，人们通常都是生吃核桃，这使核桃的营养价值相比起来更高了。
This dietary guidance and nutrition information can help them choose a healthy, nutritionally adequate diet.
该膳食指南和营养学信息可以帮助他们更好的选择健康的，营养充足的饮食。
There is no clear evidence that conventional food is harmful or that organic food is nutritionally superior.
没有证据表明传统食品有害健康或者有机食品在营养成分上更胜一筹。
Yet the conversion of grass or grain to meat is nutritionally inefficient: it takes 10kg of feed to produce 1kg of beef.
可是从草料和谷物到肉的转化效率在营养上是非常低下的：出产1千克牛肉需要10千克的饲料。
Unless you are nutritionally deficient, you probably don't need a vitamin supplement and if you do, a simple multivitamin is enough.
除非你营养不良，否则无需补充维生素。而如果你真的有需要，那么一种复合维生素就足够了。
We wanted to answer the question, 'is there any evidence that organic food is nutritionally superior to conventionally grown food?
我们要回答这个问题：是否有任何证据表明有机食品的营养优于常规种植粮食？
If the fast food industry came to you for advice about how they could nutritionally improve their menus, what would you tell them?
如果快餐业的人来找你，要你帮着出些如何改善他们的营养食谱的忠告，你会怎么对他们说呢？
On another database, they found only 150 of 500 nutritionally important plant species using the names cited in current literature.
他们使用现有文献中引用到的名字去搜索另一个数据库时，只找到了500种有营养价值的植物中的150个物种。
FAO programmes assist poor households and communities to secure access to nutritionally adequate diets and reduce child undernutrition.
粮农组织的计划帮助贫穷家庭和社区获得营养充足的膳食，减轻儿童的食物不足问题。
When a parent puts a bottle of baby formula to a child's lips, the parent might not know exactly what ingredients are in that thick, nutritionally packed mix.
当父母把一瓶婴儿配方奶放到孩子嘴边的时候，他们可能并不知道这瓶浓厚，富含各种营养的奶中具体有些什么。
With meal replacement diets, you typically replace one or two meals a day, such as breakfast and lunch, with a low-calorie, nutritionally complete shake or meal bar.
在饮食替代法中，你一般需要用低能量、营养充足的奶昔或是营养棒替代一两顿餐食，例如早餐和中餐。
Yoghurt is nutritionally similar to milk, making it an excellent source of calcium and phosphorus and a good source of high quality protein and Vitamin B2 (riboflavin).
酸奶在提供的营养物质方面与牛奶类似，这让它同样成为钙、磷、优质蛋白和维生素b2(核黄素)的极佳来源。
Yoghurt is nutritionally similar to milk, making it an excellent source of calcium and phosphorus and a good source of high quality protein and Vitamin B2 (riboflavin).
酸奶在提供的营养物质方面与牛奶类似，这让它同样成为钙、磷、优质蛋白和维生素b2(核黄素)的极佳来源。
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