High-Tech Images Show How Viruses Infect Cells At the University of Texas Medical School at Houston, Jun Liu uses a powerful electron microscope to examine E. coli bacteria and the tiny T-7 virus that infects them. Liu says until now, scientists coul

发表于:2018-12-16 / 阅读(86) / 评论(0) 分类 VOA标准英语2013年(一月)

Ebola outbreaks before the most recent one have been fairly contained: geographically limited, and just a couple hundred cases. The latest outbreak, though, which started in late 2013 and lasted more than two years, was entirely different. There were

发表于:2018-12-24 / 阅读(90) / 评论(0) 分类 2016年Scientific American(十一)月

今天我们要学的词是fabricated. Fabricated形容词,捏造的。The Syrian government denies that any chemical attack took place in early April, saying it was fabricated or staged by the rebels. 叙利亚政府否认4月初曾发动化学气体

发表于:2018-12-30 / 阅读(76) / 评论(0) 分类 英语单词荟萃

Renee Montagne: This is Morning Edition from NPR News. I'm Renee Montagne. John Ydstie: And I'm John Ydstie. In Your Health this morning, two stories on medical report cards and how people are using them. We look first at efforts to rank hospitals a

发表于:2019-01-08 / 阅读(224) / 评论(0) 分类 2006年NPR美国国家公共电台

By Carol Pearson Washington 22 May 2007 Doctors in the United States are seeing more infections from parasites normally found in developing countries. These infections could be prevented, contained or cured, but the problem is, many American doctors

发表于:2019-01-13 / 阅读(182) / 评论(0) 分类 2007年VOA标准英语(五月)

The International Committee of the Red Cross said it has begun disinfecting homes in Zimbabwe's capital in an effort to battle the cholera epidemic. Red Cross officials said the number of cases is soaring and more needs to be done to halt the spread

发表于:2019-01-13 / 阅读(86) / 评论(0) 分类 VOA标准英语2008年(十二月)

Dengue Severity Depends on Prior Infection, Genetic Variation American and Nicaraguan scientists have discovered the reason why a second infection with dengue can often be much more serious, even fatal, than the first. Dengue is a viral disease sprea

发表于:2019-01-13 / 阅读(119) / 评论(0) 分类 VOA标准英语2011年(十二月)

Study: Eradicating Cancer-Causing Infection Feasible A new study finds it may be possible to eradicate an infection responsible for an often-fatal cancer. The research also illustrates the complexities of that approach, especially when different trea

发表于:2019-01-13 / 阅读(116) / 评论(0) 分类 VOA标准英语2011年(七月)

台湾籍旅美老师今天交给我们的句子是: President Obama has unveiled a number of new proposals this week to crack down on hackers, and he plans to address this in The State of the Union speech on Tuesday. 总统奥巴马提出许多新政

发表于:2019-01-16 / 阅读(87) / 评论(0) 分类 留美老师带你每日说英文

今天我们要学的词是hard-core。 Hard-core, 是指坚定的,铁杆的。Hard-core gamers, 是指打电玩上瘾的人。Hard-core members of the party, 是指一个政党的中坚力量。All my friends are hard-core Redskin fans, 我的朋友

发表于:2019-02-08 / 阅读(152) / 评论(0) 分类 英语单词荟萃