Should we diet in order to keep fit?
为了身材，应该节食吗？
We diet not because we wholeheartedly want to. It's because we either want something or it's a necessity.
我们饮食不是因为我们真心实意地需要，而是我们因为我们想要或者这些饮食对我们来说是必需品。
You can't honestly tell me that dieting is the best thing ever. We diet not because we wholeheartedly want to. It's because we either want something or it's a necessity.
我们饮食不是因为我们真心实意地需要，而是我们因为我们想要或者这些饮食对我们来说是必需品。
We all need variety in our diet.
我们都需要饮食多样化。
In the past we have heard only negatives when it came to following a healthy diet.
过去一谈到遵循健康饮食我们就只听到否定的意见。
What can we do if we consider the healthy diet of citizens of the world?
如果为世界公民的健康饮食考虑的话，我们能做些什么？
Sure, we could all use extra sleep and a better diet.
当然，我们都需要额外的睡眠和更好的饮食。
Like every other part of the body, our diet—that is what we eat—is extremely important to the condition of our hair.
就像对身体的其他部位一样，我们的饮食——也就是我们所吃的东西——对我们头发的状况极其重要。
Exercise, diet, cognitive stimulation showed some positive effects, although the evidence was not so strong that we could actually consider these firmly established.
锻炼、饮食、认知刺激显现出了一些积极效果，尽管证据还没有足够充分到我们实际上可以确定的地步。
我们靠吃大米过活。
我们为什么要注意饮食？
Mrs. White, I'm afraid we have to put you on a strict diet.
怀特太太，恐怕我们会让你严格控制饮食了。
We must diet and take more exercise.
我们必须节食并多锻炼。
"We know if you eat a balanced diet like mom told us to eat you get this material," Adams said.
亚当斯说：“我们知道，如果你像妈妈告诉你的那样饮食均衡，你就能吃到熊果酸。”
Insulin is the main hormone that we have full control over daily through our diet and lifestyle.
胰岛素是我们可以通过日常饮食和生活方式来控制的主要激素。
Vitamins are critical to all sorts of bodily functions, and we have to get them through diet because our bodies can't make them on their own.
人体的所有功能都离不开它们。我们必须摄入含有维生素的食物，因为人体自身并不能产生这些元素。
The only reason why he lost weight was because we had changed our diet recently and started eating seafood instead of meat.
他失去了体重的唯一原因，是因为最近我们改变了饮食，转而开始吃海鲜而不是肉类。
When we go on a starvation diet to reduce our calorie intake, we not only destroy muscle tissue but also actually slow our metabolic rate.
当我们进行饥饿节食来减少我们的卡路里的摄入时，我们不仅破坏肌肉组织，实际上还减小了我们的新陈代谢率。
For decades, Americans believed that we had the world's healthiest and safest diet.
在这数十年间，美国人相信我们拥有全世界最健康和最安全的食物。
While its original use is still speculated on, most scientists agree with Darwin’s suggestion that it once helped to process the cellulose found in the leaf-rich diet that we once had.
虽然对于他本来的功能还有怀疑，大部分科学家同意达尔文的观点：它原本是帮我我们消化以树叶为主的饮食中的纤维素的。
But I learned that protein is not quite what we thought it was. We've distorted our diet seriously through the ages, and we have all the problems we have because of that distortion.
但是我认识到蛋白质并不是如我们想象中那样，长期以来我们对我们的饮食有严重的偏见，因为如此我们才有所有这些难题。
As we all know, that's not a very healthy diet, especially for growing children.
据我们所知，这不是健康的饮食，尤其是对正在生长发育期的儿童而言。
Even when we are determined to maintain our diet, we are still subtly undermined by the choices and habits of everyone else.
即使是当我们决心要保持节食状态之时，我们依然会潜移默化地受到来自其他所有人的选择和习惯的影响。
To make sure we know something about the body's requirements and reactions to diet, we have to take a "Nutrition in Food Studies" course.
要确保我们了解身体对于饮食的需求和反应，我们必须上一个“食品研究中的营养”的课程。
As we gather information about maternal health, diet, behavior and environmental exposures, we're also getting biological samples, including blood and hair.
当我们收集关于产妇保健，饮食，行为和环境风险的信息的同时，我们也得到了血液，头发等生物样品。
If we were to start from scratch, how would we design a diet to keepour weight under control?
如果我们要从头做起，我们将如何设计持续控制体重的饮食？
We then go back to eating normally again and end up putting on weight again and being fatter than we were before our "brilliant" diet or "cleanse".
然后，我们又恢复正常饮食，体重又回升了，甚至可能会比我们食素、节食之前还胖。
It's tempting to think that if we take a supplement we can exist on a diet of junk food and still be healthy.
人们很容易想到如果我们补充维生素，那么就可以既吃垃圾食品又能保持健康。
Note that we do not eat out more than a few times per month, and we eat a whole-food diet.
我们一个月出去吃饭的次数很少，而且全线节食。
Dai Yuhan, a 31-year-old mother and teacher whose familygave up meat two months ago, said: "It wasn't easy switching to avegetarian diet, but we felt it would be safer."
戴女士（DaiYuhan）是一名31岁的母亲和教师，她家人两个月前放弃了肉食，她说：“切换到素食饮食是不容易的，但我们认为这可能会更加安全。”
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