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

VOA慢速英语2010年-Health Report - New Test Could Speed T

This is the VOA Special English Health Report. Tuberculosis killed one million three hundred thousand people around the world in two thousand seven. In addition, almost half a million people who were infected with tuberculosis and with H.I.V. also di

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

2006年VOA标准英语-The Changing Face of New Orleans

By Kathie Scarrah Washington, DC 25 January 2006 watch New Orleans report Before Hurricane Katrina slammed into the Louisiana city of New Orleans last August, 60 percent of the city's nearly half a mi

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--China's New Leaders Face Economic Challenges

China's New Leaders Face Economic Challenges China's modern cities are built on a massive scale, with architecture in places such as Beijing that ranges from avant-garde to out of this world. But, just above Beijing's busy street corners are signs of

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

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

双语有声阅读：Bacteria

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