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

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

英语听力文摘 English Digest 557、为何我们的汗水不好闻？

Why Does Sweat Smell So Bad? Our bodies have two main kinds of sweat glands. The sweat glands that are distributed over most of the body produce an innocent, clear sweat thats more than ninety-nine percent water. As this watery sweat rinses your skin

英语听力文摘 English Digest 608、大自然中的DNA交易

Wouldnt it be great if we could trade genes with other species? For example, suppose you could trade the family cat your genes for intelligence for its genes for physical coordination! Well, okay, thats not likely to happen anytime soon. But DNA trad

英语听力文摘 English Digest 613、酸奶中的神秘液体

The Mysterious Liquid In Yogurt When you open a container of yogurt, youll often see liquid collected on top. Some people mix it back into the yogurt, and others drain it off. What is it, and where does it come from? To solve the mystery of the liqui

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

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

英语听力文摘 English Digest 464、狗狗和环保

Scoop That Poop Actually, dog poop turns out to have a pretty big environmental impact. If you think that two in five household s in the U.S. have at least one dog and that about forty percent of Americans dont clean up after their pooches, well, all

英语听力文摘 English Digest 456、纠结：洗手用什么？

Do hand sanitizer s work any better than soap and water? Yal: We re-enjoy our hero, the handsome Donne , in the kitchen where he's preparing baked Alaska for his lovely bride. Don: Yes, yes. The way to a woman's heart is through her stomach. Y: But w

英语听力文摘 English Digest 64、不易消化牛奶怎么办?

you shouldnt quit drinking milk. It is a good source of calcium after all.what you should do is stop consuming dairy on an empty stomach period. On an empty stomach, dairy moves faster through your intestines and is more likely to cause you intoleran

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

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

英语听力文摘 English Digest 331、洗手误区

Dirty Hands 洗手误区 Most people believe that regular hand-washing is the best way to prevent infection s . And theyre right: hand-washing does prevent certain infection s , but too much washing can actually help some infection s along.Whats goin

英语听力文摘 English Digest 210、细菌里的防护栏

Fencing in Bacteria 绿脓杆菌（p.aeruginosa）或称铜绿色假单胞菌，是一种致病力较低但抗药性强的杆菌。广泛存在于自然界，是伤口感染较常见的一种细菌。能引起化脓性病变。感染后因脓汁和渗出