标签：bacterium 相关文章
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Unit6 Section (A) How to Prepare for Earthquakes Ideally, people would like to know when an earthquake is going to happen and how bad it will be. Inboth Japan and China, people have long believed that earthquakes can be forecast. In Japan, scientists
新视野大学英语读写教程(3)
This is the VOA Special English Agriculture Report. In two thousand eight, scientists reported on a study of cotton grown in six provinces in northern China. The study involved bollworms, a major threat to cotton farmers. It also involved Bt cotton,
2010年VOA慢速英语(五)月
These days, antibiotics are no silver bullet. In fact, if you get them in the hospital, you may end up with an additional infection. Like the bug Clostridium difficile, or C. diffwhich infects more than 300,000 Americans a year and kills some 14,000.
2014年Scientific American(十)月
DEVELOPMENT REPORT – October 21, 2002: Meningitis in Africa By Jill Moss This is the VOA Special English Development Report. Health experts from Africa and international aid agencies have agreed on
农业与发展
Quadrate - one of the bones which together with the articular bones and the dentary, made/make up a reptile's jaw. In mammals the quadrate bone is incorporated into the middle ear as the incus. Ramus
医务英语
This is Scientific Americans 60-Second Science. Im Karen Hopkin. This will just take a minute. In 2005 two scientists won a Nobel Prize for discovering that a bacterium called Helicobacter pylori causes most stomach ulcers. One of them even chugged a
Scientific American(七)月
In 1980, a scientist looking at bone fragments under an ultraviolet microscope noticed the bones were glowing greena hallmark of the antibiotic tetracycline. The drug latches onto calcium and gets deposited in bone. Nothing unusual. Except these bone
Scientific American(九)月
Health Report - WHO Urges Ban on Blood Test for Tuberculosis 健康报道 - 世卫组织督促禁用血液检测方法诊断结核病 This is the VOA Special English Health Report. 这里是美国之音慢速英语健康报道。 The World Health Org
2011年VOA慢速英语(八)月
AS IT IS 2015-07-02 Drug-Resistant Tuberculosis Less Likely to Spread 耐药结核病传播的可能性较小 The number of multi-drug-resistant tuberculosis cases is rising. Multi-drug-resistant TB results from a bacterium a group of small living th
2015年VOA慢速英语(七)月
Some Volcanic Clays Kill Bacteria 一些火山灰能杀灭细菌 Ancient people knew that some kinds of clay have healing qualities. They rubbed clay on their skin to cover wounds. They also used the natural rock or soil material to treat stomach pro
2016年VOA慢速英语(二)月
Science and technology 科学和技术 Pesticides 农药 Smoking them out 把它们熏死 Tobacco extracts protect plants from pests and pathogens 烟草提取物可用于植物病虫害 THERE are, as Paracelsus put it, no poisonsonly poisonous doses
经济学人科技系列
Science and Technology Pesticides Smoking them out 科技 农药 把它们熏死 Tobacco extracts protect plants from pests and pathogens 烟草提取物可用于植物病虫害 THERE are, as Paracelsus put it, no poisonsonly poisonous doses. That is
经济学人科技系列
Now the first thing you are likely to realize is that space is extremely well named and rather dismayingly uneventful. Our solar system may be the liveliest thing for trillions of miles, but all the visible stuff in itthe Sun, the planets and their m
万物简史
DEVELOPMENT REPORT – June 17, 2002: New TB Vaccine to be Tested By Jill Moss This is the VOA Special English Development Report. Scientists are preparing to test the safety of a new vaccine medicine
农业与发展
Scientists have developed an experimental vaccine to treat individuals addicted to the drug heroin. Such a treatment would be a major step forward for both public health and safety. As we hear from Avi Arditti, heroin dependency not only destroys hum
英语语言学习
In the early days, this was an exceedingly painstaking process. 早年，这是个极费力气的过程。 Work on a single bacterium could easily consume a year. 研究一个细菌就可能一下子花掉一年时间。 At that time, according to Wo
万物简史
Precisely the same thing happens with meningitis. 脑膜炎的情况完全一样。 At least 10 percent of young adults, and perhaps 30 percent of teenagers, carry the deadly meningococcal bacterium, 至少有10%的年轻人和也许30%的少年携带着
万物简史
48 Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bac
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A lot of people love that fresh-dirt smell. The surprising thing, though, is that it isnt coming from the dirt itself. Microbiologists have traced the pleasant odor to an organic chemical called geosmin. A microbial geneticist named Keith Chater at t
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