SSS 2008-08-27
时间：2018-12-24 作者：英语课 分类：Scientific American(八)月
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute.
The plague is most famous for killing 1 tens of millions of people all over Europe in the 1300s. Plague is caused by the bacteria Yersinia pestis. And the disease still exists in pockets around the world. In fact, because it can be transmitted through the air, the government considers the plague a Category A bioterrorism agent and a serious potential threat.
Scientists from the University of Idaho have published a way to fight back at the plague in the journal Microbiology. Bacteria that cause the disease get past our defenses by dampening the immune system and actually preventing it from responding. But researchers have developed molecules 2 that mimic 3 a lipid on the bacterial 4 surface. These molecules make the immune response spring back to life.
Scientists tested a nasal spray with two such molecules on mice infected with the plague. The spray enlivened the animals’ immune systems and made antibiotics 6 much more effective. The spray and antibiotic 5 combination helped more mice live through the plague compared with a control group. Despite this advance, one should still avoid Yersinia pestis like, well, the plague.
Thanks for the minute for Scientific American's 60-Second Science. I'm Cynthia Graber .
- Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
- Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。
- 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。
- A parrot can mimic a person's voice.鹦鹉能学人的声音。
- He used to mimic speech peculiarities of another.他过去总是模仿别人讲话的特点。
- Bacterial reproduction is accelerated in weightless space. 在失重的空间，细菌繁殖加快了。
- Brain lesions can be caused by bacterial infections. 大脑损伤可能由细菌感染引起。
- The doctor said that I should take some antibiotic.医生说我应该服些用抗生素。
- Antibiotic can be used against infection.抗菌素可以用来防止感染。
- the discovery of antibiotics in the 20th century 20世纪抗生素的发现
- The doctor gave me a prescription for antibiotics. 医生给我开了抗生素。