新东方优美背诵短文50篇 Unit48: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 bacteria are u

新东方背诵文选 L48 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 abo

创新英语-Shopping Carts Covered in Bacteria

A new study into the hygiene of supermarkets has found that shopping carts are dirtier than the stores bathrooms. Microbiologist Dr Charles Gerba of the University of Arizona conducted research on the handles of 85 carts in four American states. He r

VOA标准英语2011--Libya's NTC Faces Immediate, Long-Term C

Libya'sNTCFacesImmediate,Long-TermChallenges A week after declaring it had moved to Tripoli, Libya's National Transitional Council has yet to establish a firm footing in the capital. It looks like it will be a long road ahead for the provisional auth

SSS 2008-09-23

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Sometimes a bit of bacteria can be just what the doctor ordered. If you prize yogurt for its active cultures, you know what Im talking about. Now a new s

SSS 2010-03-16

They say that who you hang out with says a lot about who you are. Well, the microbes that hang out on your fingers can point to exactly who you are. Because scientists at the University of Colorado in Boulder have been able to identify individuals ba

《英语流行话题阅读:语境识词4500》83 Where Does Bad-breath Odor Come From?

Where Does Bad-breath Odor Come From? We all have offensive breath at one time or another. In most cases, offensive breath originates from bacteria in the mouth, although there are other more surprising causes. Until a few years ago, the most doctors

unit37 Where Does Bad-breath Odor Come From 口臭是怎样产生

We all have offensive breath at one time or another. In most cases, offensive breath originates from bacteria in the mouth, although there are other more surprising causes. Until a few years ago, the most doctors could do was to counsel patients with

VOA常速英语2008年-Antibiotic-Resistant Bacteria Poses Threat to P

By Ruth Reader Washington, DC 13 February 2008 There is growing concern around the world over illnesses caused by new antibiotic-resistant bacteria, or so-called superbugs, and the decreasing effectiveness of antibiotics to treat infections. Earlier

VOA慢速英语2011--Gut Bacteria: We Are What We Eat

HealthReport-GutBacteria:WeAreWhatWeEat This is the VOA Special English Health Report. The human digestive system is full of bacteria -- mostly good bacteria. These organisms help break down food so the body can use the nutrients. Scientists are expl

Experts: Let Produce Dry Out to Avoid Bacteria

Experts: Let Produce Dry Out to Avoid Bacteria American researchers say farmers should wait one day after a rain storm or watering their fields to harvest fresh fruits and vegetables. They say gathering the crops at least 24 hours after rainfall incr

2007年VOA标准英语-Indy Racers Go Green

By Paul Sisco Washington 28 March 2007 watch Ethanol Racing report If it works for one, the rest usually follow suit. That's the way it is in motor racing. This year all 33 race cars in the Indianapolis 500 are running on ethanol, not gasoline, not

VOA标准英语2011--After Independence, South Sudan Faces Serious Challenges Ahead

After Independence, South Sudan Faces Serious Challenges Ahead As the euphoria from a hard-won independence subsides, South Sudan now must turn to face enormous development challenges. Meanwhile, the threat of a return to war and outstanding politica

VOA标准英语2011--E coli: Good Bacteria Gone Bad

E coli: Good Bacteria Gone Bad As a major outbreak of a highly toxic strain of E. coli bacteria continues to sicken residents of Europe, medical experts are racing to find the source. E. coli doesn't usually cause any trouble, says University of Minn

VOA标准英语2012--Arab World Faces Serious Poverty, Food Security Challenges

Arab World Faces Serious Poverty, Food Security Challenges A new report says Arab countries face a serious food security challenge and that poverty rates are much higher than official numbers suggest. It blames the situation on vulnerability to volat

VOA标准英语2012--Pakistan's Textile Industry Faces Challenges

Pakistan's Textile Industry Faces Challenges At the M.K. Sons factory in Faisalabad, which produces colorful printed fabrics for sale by U.S. retail giants like Walmart and Target, chief executive Rana Javed Akhtar insists that unlike the Karachi fac

英语听力文摘 English Digest 70、细菌可除臭?

Sewage stinks. But bacteria can make it smell better. Oh, yeah? That's true. Certain forms of bacteria feasting on sewage give off hydrogen sulfide, a really malodorous chemical, and one of several that give sewage its pleasing smell. In general this

Death Toll Rises From Deadly European Bacteria

European and World Health Organization scientists say a deadly outbreak of E. coli bacteria that has killed 18 people is a rare and virulent(致命的) strain of the bacteria. The latest victim died Wednesday night in Germany. The United Nations agen

VOA标准英语2011--In Colorado, Solar Industry Faces Challenges

In Colorado, Solar Industry Faces Challenges Colorado's San Luis Valley, an alpine desert, is rapidly becoming a leading producer of solar energy in the United States. The sun shines more than 340 days a year in the San Luis Valley. So the solar indu

Using bacteria to generate energy hopeful

BEIJING, May 24 (Xinhuanet) -- Scientists revealed for the first time the molecular structure of proteins, which enables bacteria to transfer electrical charges, according to a new study. The revelation was published in Proceedings of the National Ac