视频文本
New dietary guidelines will be issued for 2010.
新的膳食指南将在2010年发布
It is suggested that
有人建议
the guideline for the entire population
新的膳食指南应建议将推荐值改为1500毫克
will be 1500 mg.
且这一推荐值应面对全部人群
The picture shown depicts
这张图片描述的是
where sodium comes from in the average diet.
日常食品中的钠的来源
There's growing concern
美国食品中钠含量过高这一现象
that intake of sodium is too high in the US diet.
已经引起了越来越多的关注
This shows several examples of high sodium foods
这里显示了几个美国食品中常见的
that are common in American diets.
高钠食品
Again the main function of sodium in food
食品中钠的作用仍然是
is used as a preservative and flavor enhancer.
被当作防腐剂和口味增强剂
This is the reason such foods as frozen meals,
这就是比如冷冻食品，罐装食品
canned items and prepared mixes are high in sodium.
以及混合食品中钠含量高的原因
How will you know if the food you are eating
你怎么才能知道你正在吃的东西
is high in sodium?
钠含量是否过高?
Reading the nutrition facts label of products
阅读食品包装标签上的营养成分说明
is the best way to understand this.
是最好的了解方式
Let's take a look at how to read this label.
让我们一起看看如何阅读这个标签
The food's sodium content is always shown
食品的钠含量一般都会在
on the food label.
食品标签中写明
The amount listed will be in milligrams.
数量单位一般是毫克
This aspect of the label is important to
如果你被要求吃低钠食品
pay attention to if you are required
注意阅读这个标签
to be on a low sodium diet.
是非常重要的
Something to remember
在阅读食品包装标签的时候
when reading food labels is that
需要记住的一点是
what is shown is only one serving size
标明的数值只是一份中的含量
which could make these numbers very deceiving.
这个数字可能非常具有误导性
This particular label is for Kraft Macaroni
这个标签属于豪华装
and Cheese Deluxe Edition.
卡夫浓郁芝士通心粉
Notice that there are 4 servings in this package
请注意这一包装里面有四份
and only one serving consists of
而其中只有一份中含有
over a third of the dietary guideline for sodium
膳食指南的钠推荐摄入量
which is 2300 mg.
2300毫克的三分之一
When looking at the percent daily value
当看到日常数值的百分比时，应该意识到
it is important to remember that
这些百分比是基于2000卡路里的食品的
these percentages are based on a 2000 calorie diet.
这一点非常重要
The percentages are also based on
这些百分比也基于全天的
totals for the whole day.
食品摄入
For example, for this particular label
比如说，在这张标签上
the sodium content of one serving is 35%
一份的钠含量是
of the total amount of sodium recommended per day.
每日推荐钠摄入量的35%
As stated before the quantities on a food label
前面我们已经提到过，标签上的数值
are given in milligrams.
都以毫克为单位
Here are some sodium equivalents in household
这里有一些日常生活中的钠当量
measures to help you compare these values.
可以帮助你对比这些数值
It may be surprising to find that
人们也许会感到惊讶的是
the recommended dietary allowance
膳食指南中的钠推荐摄入量
for sodium is only 1 teaspoon.
仅仅是一茶匙那么多
Specific words on food packages
食品包装上的某些字眼
can be very confusing.
也可能让人感到迷惑
Here are some examples of common terms
这里有一些含钠物品的包装标签中
used on labels related to sodium content
在解释钠含量的时候
and their explanations.
常用的词语
It is helpful to know that these words
这些词语均由粮食及药物管理局
are legally defined by the FDA
进行了法律上的规范解释
and therefore you can be sure about their meaning
因此你在食品包装上看到这些词语的时候
each time you see them on a package.
可以非常确定它们的含义
Some things to note are that reduced sodium
有一些事项值得注意
is a relative term and compares the amount of sodium
"限钠"是与目前普通食品中的钠含量
in the current food to the usual product.
相比较而言的
This does not always mean
它并不总是意味着
the reduced sodium product is actually low in sodium.
限钠产品的钠含量确实很低

视频及简介

视频简介：

本课程的目标是，向公众提供最新的有关营养方面的信息和话题，内容涵盖饮食因素对于癌症的影响作用，健康的饮食习惯，学校能提供的营养有哪些，咖啡因与癌症的联系，水果蔬菜与癌症预防等。通过本课程的学习，人们可以学习到健康的生活饮食习惯，在每天的饮食中防癌症于未然

重点讲解

重点讲解：
1.the best way to 最好的方法；最好的方式；干…的方法
例句：The best way to help is often simply a matter of opening doors and offering guidance.
提供帮助的最好办法通常只是开门引导。

2.take a look at 看一下；看一眼；看看
例句：Thank you. I'll take a look at it and get back in touch with you.
谢谢。我看过之后再联络你。

3.pay attention to 注意；重视；对……注意
例句：In fact, as long as you pay attention to information gathering, is not difficult to understand from the newspaper to discount policy.
其实只要注意信息搜集，不难从报纸上了解到贴息政策。

4.be helpful to 对……有益处；对…有帮助；对……是有帮助的
例句：Proper nutrition will probably also be helpful to maintain elasticity of those ligaments and of the skin.
合理的营养也可能对保持皮肤和韧带的弹性有益。