英语四级

听力入门英语演讲VOA慢速英语美文听力教程英语新闻名校课程听力节目影视听力英语视频

BBC六分钟英语听力精选:紫色土豆

Cherie207 于2014-08-08发布 l 已有人浏览
增大字体 减小字体
大家好,欢迎收听BBC六分钟英语听力精选,我们将会给你带来各种各样的消息新闻,今天要说的是紫色土豆。
    小E英语欢迎您,请点击播放按钮开始播放……

140807095101_gm-tomato_470x150_bbc.jpg

Purple tomatoes

紫色土豆

你会吃紫色的土豆吗?如果它有益于健康呢?科学家已经研制出一种紫色土豆,将会在不久之后出现在商店的货架上。 This is the latest example of genetically modified food - food that has been changed from its natural form. There are many reasons for growing GM food, and Rob and Finn discuss some of them in the programme.

这是一种最新的改变了原有结构的转基因食品。种植转基因食品有很多原因,Rob和Finn将会在节目里和大家讨论一下。

他们还会和大家一起学习下与这些人造农作物相关的词汇。

本周问题:

在哪一年先在市场上销售第一种转基因食品的呢?在:

a) 1974年

b) 1984年

c) 1994年

让我们一起听节目,找答案吧!

听力内容:

Purple tomatoes

NB: This is not a word-for-word transcript

Rob: Hello I’m Rob. Welcome to 6 Minute English. With me today is Finn. Hello Finn.

Finn: Hello Rob.

Rob: Now Finn, I'd like to start by asking you a question. Would you eat a purple coloured tomato?

Finn: Purple? Well, that depends. Is it a naturally coloured tomato? Where does it come from? Is this an artificial tomato? Rob, tell me more.

Rob: Artificial – yes, you mean is it man-made and trying to copy something that is natural? Well, in a way - yes. Because scientists have developed a genetically modified purple tomato; they took red tomato plants and changed their genetic patterns so that they now produce new, purple tomatoes.

Finn: Yes, so this would be an example of GM – genetically modified – food. It's something we'll be discussing more soon and, of course, looking at some related vocabulary.

Rob: But here's another question for you Finn that hasn't been modified – or changed – in any way! GM food has been researched and experimented with for many years but do you know when the first genetically modified food was first sold commercially? Was it in:

a) 1974

b) 1984

c) 1994

Finn: Well, we think of GM food as a recent thing so I'll say the opposite, a) 1974.

Rob: OK, we’ll find out if you're right later on. Let's talk more now about genetically modified food – or GM food. It's called this because the food's genes have been changed. This means the way it grows is different from the way it grows when it isn’t touched by humans.

Finn: Yes, so, growing GM food – or crops – is controversial. Some scientists think it's needed to meet the world's growing demand for food.

Rob: Yes, GM food can resist – or stop the effects of – some pests or bad weather. It can grow more quickly, meaning even more crops can be cultivated – or grown.

Finn: But opponents of GM food – people who argue against it – say we don't know enough about its effect on the environment.

Rob: And then there are the fears about who controls what's grown.

Finn: Yes, but despite this, GM food has become an important part of food production. Crops like sweetcorn, rape plants, wheat and tomatoes have all been genetically modified.

Rob: Yes, like the purple tomato, which was recently developed in the UK. It has a dark pigment – or colour – which gives it the same potential health benefits as blueberries.

Finn: Well, that sounds like a good thing. And not only that, it has an antioxidant – that's a substance that stops the decaying process – which tests show could help fight cancer.

Rob: One day we could see these purple tomatoes on pizzas or in our tomato ketchup. Let's hear from Professor Cathie Martin who is a plant biologist from The John Innes Centre who developed this tomato. What does she say is good about this new food?

Professor Cathie Martin, Plant Biologist, John Innes Centre:

With these purple tomatoes, you can get the same compounds that are present in blueberries and cranberries that give them their health benefits but you can apply them to foods that people actually eat in significant amounts and that are reasonably affordable.

Rob: So she says the good thing about this development is we can get health benefits from something we eat significant amounts of – so lots of – and they will be reasonably affordable – so it will be cheap.

Finn: Yes but there's still maybe a problem with the colour. We are affected by the colour of stuff we put in our mouths. I mean, who eats blue food?!

Rob: That's true. And also because the European Union has restrictions on growing GM food, this tomato has to be grown in Canada where rules are more supportive of GM foods.

Finn: OK. Well, Professor Nick Pidgeon, who is an Environmental Psychologist, says in the UK there is some distrust of GM food.

Rob: He says some people are concerned all this is messing with nature – it's not natural – and maybe we don't know what the long-term consequences are.

Finn: And a big concern is that large corporations will have control over the technology. And this could mean they control food prices too. You know Rob, I think this is a debate that will go on and on and on.

Rob: Indeed. But it's now time to reveal the answer to today's question. Earlier I asked you if you knew when the first genetically modified food was first sold commercially.

Finn: I said a) 1974.

Rob: Interesting. The answer is actually 1994. A company called Calgene sold a product that delayed the ripening of tomatoes.

Finn: OK, well, I guess that means the fruit could last longer and it would stop it going soft?

Rob: That was the idea. Now, before we go, Finn, could you remind us of some of the vocabulary that we've heard today?

Finn: Yes, I will.

artificial

genetically modified

genes

resist

pests

cultivated

pigment

antioxidant

significant

affordable

distrust

ripening

Rob: Well, that brings us to the end of today's 6 Minute English. We hope you’ve enjoyed today’s programme. Please join us again soon.

Both: Bye.

词汇学习:

1. artificial 人工的,人工制造的

2. genetically modified 转基因的;基因改造

3. genes 基因

4. resist 抵御

5. pests 昆虫

6. cultivated 耕种的;栽培

7. pigment 天然色素;呈现颜色

8. antioxidant 抗氧化

9. significant 重要的,有意义的

10. affordable 负担得起,价格优惠

11. distrust 不信任,怀疑

12. ripening 成熟

 1 2 下一页

分享到

添加到收藏

听力节目排行