[网络] 农杆菌;质粒转化脓杆菌;根癌类细菌

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

发表于:2018-11-28 / 阅读(491) / 评论(0) 分类 新概念优美背诵短文50篇

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

发表于:2018-12-01 / 阅读(195) / 评论(0) 分类 新东方背诵文选

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

发表于:2018-12-07 / 阅读(185) / 评论(0) 分类 创新英语

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

发表于:2018-12-24 / 阅读(126) / 评论(0) 分类 Scientific American(九)月

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

发表于:2018-12-24 / 阅读(116) / 评论(0) 分类 Scientific American(三)月

By Mario Ritter Broadcast: October 7, 2003 This is Doug Johnson with the VOA Special English Agriculture Report. Today we finish a two-part series. A listener in Brazil asked about 1)agroecology. This

发表于:2019-01-02 / 阅读(168) / 评论(0) 分类 VOA2003(下)-农业与经济

By Mario Ritter Broadcast: September 30, 2003 This is Steve Ember with the VOA Special English Agriculture Report. This week, we take a suggestion from a listener in Brazil. Agricultural specialist Lu

发表于:2019-01-04 / 阅读(147) / 评论(0) 分类 VOA2003(下)-农业与经济

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

发表于:2019-01-07 / 阅读(124) / 评论(0) 分类 VOA常速英语2008年(二月)

Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl

发表于:2019-01-09 / 阅读(126) / 评论(0) 分类 VOA标准英语2011年(四月)

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

发表于:2019-01-12 / 阅读(151) / 评论(0) 分类 2011年VOA慢速英语(九)月

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

发表于:2019-01-12 / 阅读(231) / 评论(0) 分类 2015年VOA慢速英语(七)月

By Steve Herman New Delhi 19 July 2007 High-level talks between India and the United States are going into an unscheduled third day in Washington in the hopes of overcoming obstacles to a controversial nuclear cooperation agreement. VOA's Steve Herma

发表于:2019-01-12 / 阅读(185) / 评论(0) 分类 2007年VOA标准英语(七月)

Attack on Pro-Gbagbo Protestors Draws Criticism from Ivorian Rights Group Dozens of supporters of former Ivory Coast President Laurent Gbagbo were attacked and injured during a rally Sunday in Abidjan, after opponents began throwing stones. Eric-Aim

发表于:2019-01-13 / 阅读(109) / 评论(0) 分类 VOA标准英语2012年(一月)

Peter Heinlein | Addis Ababa 22 February 2010 The Green Revolution that ended food shortages in parts of the world decades ago may be coming to East Africa, bringing the promise of bountiful harvests in a region more often associated with drought and

发表于:2019-01-13 / 阅读(117) / 评论(0) 分类 VOA标准英语2010年(二月)

Study: Vitamin D is Powerful Weapon Against TB Vitamin D plays a critical role in fighting infection and now scientists say that it may be a powerful weapon against tuberculosis. In a study reported in the journal Science Translational Medicine, rese

发表于:2019-01-14 / 阅读(94) / 评论(0) 分类 VOA标准英语2011年(十月)

William: Hello! Youre listening to Authentic Real English. My names William Kremer and Im joined by Feifei Feng. Feifei: 大家好,我是冯菲菲。欢迎收听《地道英语》,今天我们要学习的这个词是... um William: Is there somet

发表于:2019-02-02 / 阅读(122) / 评论(0) 分类 英文语法词汇

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

发表于:2019-02-04 / 阅读(124) / 评论(0) 分类 英语新闻

By Jeff Swicord Cheyenne, Wyoming 10 September 2007 Workers at adairy farm There is growing concern that farms and ranches in the western U.S. could become the target of agroterrorism. The devastating outbreaks of foot and mouth disease in Britain a

发表于:2019-02-05 / 阅读(200) / 评论(0) 分类 2007年VOA标准英语(九月)

The AG600 amphibious aircraft is expected to take its maiden flight over land in the first half of 2017 and on water in the second half, said its developer, the Aviation Industry Corporation of China (AVIC). 国有飞机制造商中国航空工业集团

发表于:2019-02-06 / 阅读(122) / 评论(0) 分类 英语新闻

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

发表于:2019-02-07 / 阅读(101) / 评论(0) 分类 英语新闻
学英语单词
air breakup
air premeability
Alibeyköy
Antarctic continent
artificial lipid bilayer
automatic repeat request (arq)
axioversion
axis out of line
bespouted
broad sow
Carpomycetae
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centre buoy
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compile link and go
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counter-instrument
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Distyliopsis dunnii
Drumaroad
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eight-year
etacists
exponential tube
failure tree analysis
Fargesia conferta
federal communications commission
fiestas
foot walk
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freemail
golden tincture
Gonostegia pentandra
guaranteed level of service
hairpinning
heidemann
ileogastric reflex
intercalative
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Juntura
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lethargic stage
line leader
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litmus milk
Lobus parietalis
magneto-static energy
marjies
martingale
microwave plasma chemical vapor deposition
middle-middle
mil-dot
Miocene
natroopal
necessitas non habet legem
newspaper bundling machine
normal form PDA
one-party dominant
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optional accessories
orbicoms
osmiophil
part shape
peders
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precured period
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Ptyas mucosus
Pyrcon
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radiation survey meter
reducing agent
remigate
Salsola brachiata
screw of tangential cutter head
sea beat
sealed head
sibo
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squareface
standard waveform
steam sealing line
sterculia family
sulfadimidine
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syrrotium
the doctrine of necessity
total mineral acidity
univac share assembly program
unscrewing
vaporable
verification by consent
Vokhtoga
VOTs
zephyr