视频文本

As we have seen, pesticide and nitrate levels are lower,
正如我们所见杀虫剂和硝酸盐的含量都较低，
but E-coli contamination of fruits and vegetables before market preparation is much higher.
但是在进入市场之前，水果和蔬菜遭受大肠杆菌污染的可能性更大
Also, the synthetic chemicals used by organic farmers have health risks of their own
同时，有机农场中用到的合成化学物质也会对健康造成风险，
and some allow chemicals containing copper and magnesium sulfates,
一些化学物质含有铜和镁还有硫酸盐，
which can be fatal if ingested directly.
这些物质如果直接食用会威胁人的生命，
The FDA and USDA provide strict regulations for pesticides, herbicides,
农业部和环保局对传统农业生产中所用到的杀虫剂，除草剂
and other chemicals used in conventional farming.
等化学物质有严格的规定
Bio-solids used in agricultural fertilizer must be processed using stringent,certified procedures
农药中用到的有机污泥，在处理过程中必须严格遵守相关规定
and are closely monitored for compliance.
并进行严格的监控，
Simply put, there is no current scientific evidence to show conclusively that
简而言之，目前没有科学证据能够系统地表明
organic food is healthier than conventional food.
有机食品比传统食品更加健康
While the French tomato study indicated higher vitamin C
尽管在法国的实验中，用于测试的有机番茄中确实含有更多的
and carotinoid levels in a specific type of tomato tested,
维生素C和类胡萝卜素，
there was no noted increase in antioxidant properties.
但它们并没有使人体内抗氧化物的数量增加，
Unfortunately,there are few studies that have shown any benefits of nutritional quality in organic foods,
不幸的是很少有研究能够表明，有机食品中的营养物质对人体有哪些好处，
and most of the tests showed only one type of vegetable in specific soils and under specific growing conditions.
大多数实验只检测了某种土壤环境下，在某种生长环境下的一种蔬菜
The question as to whether the consumption of organically grown vegetables
关于食用有机食品是否会比食用传统食品会给人的身体
causes any greater microbiological risk to consumers than conventional vegetables remains unclear.
带来更大的微生物层面的风险这个问题现在还不明了
While some studies show higher bacterial contamination in conventional versus organic crops,
一些研究显示，传统食品中的细菌污染更严重，
other studies indicate more bacterial contamination in organic versus conventional crops.
而另一些实验则表明有机食品中的细菌污染更加严重
As we've seen, animal manure that hasn't been properly composted significantly increases E-coli levels,
正如我们所见，没有经过适当发酵的动物粪便会增加大肠杆菌的数量
and animal manure is a big factor in organic farming.
而动物粪便在有机农业中又不可或缺
Another factor in food safety concerns the use of antibiotics in the production of animals for food.
食品安全中的另一个问题就是在肉类生产过程中用抗生素
While a University of Iowa study reported MRSA prevalence in one facility,
衣阿华大学的研究发现，一个农场中的MRSA感染率极高，
researchers were unable to find a reason for the lack of MRSA at another facility.
而另一个农场却没有，但他们却无法找到其中的原因
In the Denmark study,
在丹麦的研究中，
banning the use of antibiotics in growth promotion resulted in increasing the need for therapeutic drug intervention
禁止将抗生素用来促进家畜的生长，使得药物干涉的需求越来越高，
and an increase in human antibiotic resistance to food borne pathogens,
同时使得人类体内的众多病原体产生了抗体
specifically salmonella and campylobacter.
尤其是沙门氏菌和弯曲菌属，
Obviously, more research is needed to determine the benefits and shortfalls in the use of antibiotics in animal production.
显而易见，要确定在家畜的生长过程中使用抗生素有哪些利弊，我们还需要更多的研究，
Now that you've seen the popular arguments and the scientific evidence, what do you think?
现在我们已经看到了社会上流行的说法和科学提供给我们的证据，大家会怎么想呢?
When it comes to making the best decision for you and your family,
关于为自己和家庭选择何种食品，
the decision on whether or not to buy organic foods is solely up to you.
是否选择有机食品这个决定完全在于你自己，
Organic foods are usually more expensive and have less seasonal availability,
有机食品通常更贵，季节性也更加明显
but may appeal to consumers who feel the increased cost is worth it.
但可能会让一些消费者觉得物有所值，
Conventional foods have their own benefits.
而传统食品也有它们自己的优势，
They are widely available year round.
它们一年四季皆可买到，
They are more budget friendly.
并且价格更加低廉
And some consumers trust the brand name associated with certain foods.
一些消费者对于某些品牌的食品具有特殊的信任，
Simply put, there is not enough scientific evidence to favor one type of production over another.
简而言之，目前还没有足够的证据表明，两种食品之间的优劣
What's more important is that you continue to eat the recommended intake of fruits and vegetables
更重要的是，不论你选择传统食品还是有机食品，
whether your choice is conventional or organic.
你都应该每日食用一定量的蔬菜或水果
For optimal health and nutrition,
要吸收足够的营养来保持身体健康
you should strive to consume two and a half cups to three cups of vegetables and two cups of fruit each day.
每天最好食用两杯半到三杯蔬菜以及两杯水果

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。