VOA慢速英语 2007 0305a
时间：2019-01-11 作者：英语课 分类：VOA慢速英语2007年（三）月
英语课
This is the VOA Special English Development Report.
Nanotechnology uses matter at the level of molecules 2 and atoms. Researchers are finding different uses for particles with a length of one nanometer, or one-billionth of a meter. These include things like beauty products and dirt-resistant clothing. But one area where many experts believe nanotechnology holds great promise is medicine.
Last week, speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries. The program took place at the Woodrow Wilson International Center for Scholars.
Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to confirm cases of malaria 3. He says it could offer a better way than the traditional process of looking at a person's blood under a microscope.
In poor countries, this process is often not followed. As a result, sick people may get treated for malaria even if they do not have it. Such misuse 4 of medicines can lead to drug resistance.
Quantum dots are particles that give off light when activated 5. Researchers are studying ways to program them to identify diseases by lighting 6 up in the presence of a targeted molecule 1.
Experts say nanotechnology shows promise not just for diagnosing diseases, but also for treating them. Piotr Grodzinski of the National Institutes of Health talked about how nanotechnology could make drugs more effective.
He talked about cancer drugs already developed with nanotechnology. He says if a drug can target a cancer locally in the body, then much less of it might be needed, and that means lower side effects.
Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. He noted 7 that Brazil, India, China and South Africa are currently doing nanotechnology research that could help poor countries.
But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles. Experts say more investment in research is needed to better understand these risks.
And that's the VOA Special English Development Report, written by Jill Moss 8. Transcripts 9 and audio files of our reports are at www.unsv.com. I'm Steve Ember.
Nanotechnology uses matter at the level of molecules 2 and atoms. Researchers are finding different uses for particles with a length of one nanometer, or one-billionth of a meter. These include things like beauty products and dirt-resistant clothing. But one area where many experts believe nanotechnology holds great promise is medicine.
Last week, speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries. The program took place at the Woodrow Wilson International Center for Scholars.
Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to confirm cases of malaria 3. He says it could offer a better way than the traditional process of looking at a person's blood under a microscope.
In poor countries, this process is often not followed. As a result, sick people may get treated for malaria even if they do not have it. Such misuse 4 of medicines can lead to drug resistance.
Quantum dots are particles that give off light when activated 5. Researchers are studying ways to program them to identify diseases by lighting 6 up in the presence of a targeted molecule 1.
Experts say nanotechnology shows promise not just for diagnosing diseases, but also for treating them. Piotr Grodzinski of the National Institutes of Health talked about how nanotechnology could make drugs more effective.
He talked about cancer drugs already developed with nanotechnology. He says if a drug can target a cancer locally in the body, then much less of it might be needed, and that means lower side effects.
Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. He noted 7 that Brazil, India, China and South Africa are currently doing nanotechnology research that could help poor countries.
But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles. Experts say more investment in research is needed to better understand these risks.
And that's the VOA Special English Development Report, written by Jill Moss 8. Transcripts 9 and audio files of our reports are at www.unsv.com. I'm Steve Ember.
n.分子，克分子
- A molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由P妈̬f婘̬ 妈̬成的。
- This gives us the structural formula of the molecule.这种方式给出了分子的结构式。
分子( molecule的名词复数 )
- The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
- Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。
n.疟疾
- He had frequent attacks of malaria.他常患疟疾。
- Malaria is a kind of serious malady.疟疾是一种严重的疾病。
n.误用，滥用；vt.误用，滥用
- It disturbs me profoundly that you so misuse your talents.你如此滥用自己的才能，使我深感不安。
- He was sacked for computer misuse.他因滥用计算机而被解雇了。
n.照明，光线的明暗，舞台灯光
- The gas lamp gradually lost ground to electric lighting.煤气灯逐渐为电灯所代替。
- The lighting in that restaurant is soft and romantic.那个餐馆照明柔和而且浪漫。
adj.著名的，知名的
- The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
- Jim is noted for arriving late for work.吉姆上班迟到出了名。
n.苔，藓，地衣
- Moss grows on a rock.苔藓生在石头上。
- He was found asleep on a pillow of leaves and moss.有人看见他枕着树叶和苔藓睡着了。
n.抄本（ transcript的名词复数 ）；转写本；文字本；副本
- Like mRNA, both tRNA and rRNA are transcripts of chromosomal DNA. tRNA及rRNA同mRNA一样，都是染色体DNA的转录产物。 来自辞典例句
- You can't take the transfer students'exam without your transcripts. 没有成绩证明书，你就不能参加转学考试。 来自辞典例句