标签：bacteria 相关文章
By Gary Garriott Broadcast: September 1, 2003 This is Sarah Long with the VOA Special English Development Report. People have always had to find ways to keep food safe to eat. Methods to dry, smoke an
VOA2003（下）-发展与科学
Voice 1 Hello. Im Marina Santee Voice 2 And Im Elizabeth Lickiss. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 The sun beats
环球英语 Spotlight
Every six months, I visit my dentist for a regular dental check up. At the dentist's office, a dental assistant will bring me into one of their private patient rooms and x-ray my teeth and gums to detect any problems inside my teeth. Then, the dentis
社会—In the Community
SCIENCE IN THE NEWS -January 8, 2002: Top stories of 2001 By Nancy Steinbach VOICE ONE: This is Bob Doughty. VOICE TWO: And this is Doug Johnson with the Special English program SCIENCE IN THE NEWS. T
科技之光
By Mario Ritter Broadcast: August 19, 2003 This is Steve Ember with the VOA Special English Agriculture Report. A study has found no serious effects after farmers in Denmark ended the use of 1)antibio
VOA2003（下）-农业与经济
Transcript: A: Hey, Im reading this really interesting article about the human body. B: Yeah? Well, we know all about that from biology lessons. A: No, we didnt learn much at all at school! Theyre discovering loads more things all the time. Really am
一起闲话英语-English Chitchat
August the 6th is Fresh Breath Day. It is a day when we can think about our breath and how it affects our life and relationships. Bad breath is one of lifes most personal problems. It can make or break a romantic relationship and have an impact on ho
世界节假日博览
August the 6th is Fresh Breath Day. It is a day when we can think about our breath and how it affects our life and relationships. Bad breath is one of lifes most personal problems. It can make or break a romantic relationship and have an impact on ho
英语课程学习计划和讲义
How Do Iceboxes Work? Back when most folks relied on an icebox to cool food, a block of ice was a precious commodity. If you put hot food in the icebox, the ice might melt. And by the time the ice truck came through the neighborhood again, all your f
英语听力文摘 English Digest
What's the first thing yout do when your family gets to your hotel room? Several recent studies suggest it might be a good idea to pull out a package of antibacterial wipes and give your room a quick once-over. 当你和家人入住酒店时，第一件
阅读空间
Every week this summer, we'll be doing these special web shows. Today, we're talking about a story we covered toward the end of the school year: an outbreak of E. coli. That's a specific kind of bacteria. You can get it from contaminated food or wate
CNN2011年(六)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
第四节 适应症 适应症最常用的有以下几种表示方法 Indications适应症 Indications and Usage 适应症与用途 Major（Principal）Indications 主要适应症 Uses用途 Action and Use作用与用途 偶尔也会见到其他的表示
医学英语
Researchers Say Most Deaths of Newborns Preventable 研究人员表示大多数新生儿的死亡是可以避免的 From VOA Learning English, this is Science in the News. This week, we report on research that shows most newborn baby deaths could be
2014年VOA慢速英语(六)月
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
SCIENCE IN THE NEWS -July 9, 2002: Tuberculosis By Oliver Chanler VOICE ONE: This is Bob Doughty. VOICE TWO: And this is Steve Ember with Science in the News, a VOA Special English program about recen
科技之光
TB Origins Found in Africa 肺结核起源于非洲 The origins of humans have been traced to Africa. And now, so have the origins of tuberculosis. New research shows the evolutionary trees of both humans and TB have grown side-by-side. TB bacteria o
VOA常速英语2013年(九月)
1.President Barack Obama and his economic team are taking a cheerier tone on the economy while making about ten billion dollars in federal loans available to struggling small businesses. The White House economic team hopes to build confidence in the
美联社新闻一分钟2009年(三)月
A lot of little organisms that looked like bacteria and behaved like bacteria were actually something else altogether, 许多小生物看上去像细菌，表现得像细菌，实际上完全是另一类东西， something that had branched off from
万物简史
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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