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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。
adv. 先前，在此之前
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- The educational materials presented here
- 今天展示的教育材料
- were developed by students and faculty
- 是由爱荷华州立大学营养学
- of the department of food science and human nutrition
- 和人体营养学系的
- at Iowa State University.
- 学生和老师提供的
- Funding for this project was provided by grants
- 该项目的资金由
- from the American Cancer Society Mid West
- 美国中西部地区癌症协会
- and the Lance Armstrong Foundation.
- 及兰斯，阿姆斯斯壮基金会提供
- The materials are intended for educational use
- 这些材料仅用于教学
- and are not meant to provide medical advice.
- 并非用以提供医疗指导
- We welcome your feedback about these materials.
- 欢迎大家对这些材料做出反馈
- Please use the evaluation survey link on the homepage
- 请用主页上提供的调查评价链接
- to provide your comments and suggestions.
- 提交你们的评论和建议
- Protein. During this presentation we will talk
- 蛋白质，在今天的演讲中我会讲
- about many aspect of protein, from why we need it
- 蛋白质的很多方面，包括从我们为什么需要蛋白质
- to tips on how to make good choices.
- 到如何做明智选择的忠告
- To begin, proteins are made up of amino acids.
- 首先，蛋白质由氨基酸组成
- Different amino acids come together
- 不同的氨基酸合在一起
- to form different types of protein.
- 能够形成不同的蛋白质
- Protein is needed in the body for many reasons,
- 身体需要蛋白质的原因很多
- most commonly for growth as well as
- 最常见的是为了促进成长以及
- tissue replacement and maintenance.
- 替换或维护组织
- As previously mentioned, proteins are made up of
- 就像之前提到的，蛋白质由
- amino acids. There are 2 types of amino acids;
- 氨基酸组成，有两类氨基酸
- essential and non essential.
- 必需氨基酸和非必需氨基酸
- True to their names, non essential amino acids
- 就像它们名称一样，非必需氨基酸
- can be synthesized by your body
- 可以由身体本身合成
- and therefore it is not essential to get them
- 因此不必通过
- from your daily diet.
- 日常膳食摄入
- The other type of amino acids are essential
- 另一种氨基酸是必需氨基酸
- which means it is necessary to
- 意味着必须
- get them from your diet.
- 从饮食中摄入氨基酸
- Taking what we've learned about essential
- 考虑到我们对必需氨基酸
- and non essential amino acids,
- 和非必需氨基酸的了解
- we can now discuss 2 more categories of protein.
- 我们可以讨论另外两种蛋白质
- The categories are complete and incomplete proteins.
- 即完全蛋白质和不完全蛋白质
- A protein is considered complete when it contains
- 一种蛋白质属于完全蛋白质，是因为它含有
- all of the essential amino acids.
- 所有的必需氨基酸
- Common sources of this type of protein
- 这类蛋白质通常可以从
- are animal sources such as meat and milk.
- 动物身上获取，例如肉类或者奶制品
- Incomplete proteins therefore are proteins
- 因此不完全蛋白质就是那些
- that lack one or more of the essential amino acids.
- 缺少一种或多种必需氨基酸的蛋白质
- Common sources of this type of protein
- 这类蛋白质通常来源于
- are most vegetable proteins.
- 蔬菜蛋白质
- Another type of protein that also exists
- 还有一种蛋白质
- are complementary proteins.
- 叫做互补蛋白质
- Complementary proteins consist of 2 or more
- 互补蛋白质由两种或多种
- incomplete proteins that when mixed together
- 不完全蛋白质组成，当混合在一起时
- form a complete protein.
- 两种不完全蛋白质可以合成一种完全蛋白质
- A classic example of this is rice and beans.
- 一个经典的例子就是大米和黄豆
- Separately they lack specific amino acids
- 分开时二者都缺一种必需氨基酸
- that are necessary but together they provide
- 但合在一起时它们可以形成
- a complete protein.
- 一个完全蛋白质
- Protein is found in many foods,
- 许多食物中都含有蛋白质
- all foods made of meat, protein and fish
- 肉类，蛋白质类和鱼类食品中
- contain protein as well as other sources
- 都含有蛋白质，其它
- of dry beans or peas, eggs, nuts and seeds.
- 干黄豆，豌豆，鸡蛋，坚果或种子类食物也含有蛋白质
- How much protein do you need to consume daily?
- 我们每天应当摄入多少蛋白质呢
- How much protein is too much?
- 多少蛋白质算多
- And are you getting enough?
- 多少算适量
- One excellent source for understanding
- 一个很不错的网站上可以了解
- how much protein you need is www.mypyramid.gov.
- 蛋白质需求量，那就是 www.mypyramid.gov.
- According to my pyramid, adults should get 5.5 ounces
- 该网站上说，成年人每天应当摄入5.5盎司的蛋白质
- of protein every day. Recommendations are made
- 建议的蛋白质摄入量都是以盎司为计量单位的
- in ounce equivalents, for example; one meat patty
- 例如，一个肉饼
- is about 2 ounce equivalence. All foods
- 大概相当于两盎司蛋白质，所有食物
- have an ounce equivalent and once they are learned
- 都有相应的蛋白质盎司值，一旦知晓了这些值
- all you have to worry about
- 我们需要做的就是
- is getting 5.5 of them each day.
- 每天摄入5.5盎司
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| 重点单词 | 查看全部解释 | |||
| previously | ['pri:vju:sli] | |||
| classic | ['klæsik] | |||
| essential | [i'senʃəl] | 联想记忆 | ||
| complementary | [.kɔmpli'mentəri] | |||
| maintenance | ['meintinəns] | 联想记忆 | ||
| survey | [sə:'vei] | |||
| consume | [kən'sju:m] | 联想记忆 | ||
| nutrition | [nju:'triʃən] | |||
| foundation | [faun'deiʃən] | 联想记忆 | ||
| evaluation | [i.vælju'eiʃən] |
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