单词：trophic groups of microorganisms
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This is Scientific American's 60 Second Science. I'm Steve Mirsky, got a minute? The Meridiana Planum region of Mars once had water that was really soft and highly acidic, conditions in incredibly hostile to any life forms that we know about. So any
Scientific American(二)月
Mike: So Dusty, we were talking earlier, and you're telling that you're into marine biology, and that's kind of your background. So, tell me a little bit about why you like - what's your fascination with marine biology? Dusty: Well, the main thing is
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Don: Time to go again to the A Moment of Science mailbag. A listener writes: Dear Don Yal, I've been reading a lot about climate lately, and I know that the earth stores lots of carbon in different places, like in the ocean and in plants. Are there a
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The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee
火星生命
He wears gloves and cleans his tools with alcohol to avoid contaminating the ancient salt samples with modern microorganisms.
寻访外星人
By June Soh and Rosanne Skirble New Orleans 26 April 2006 watch Post Katrina Health report Mold is still present on this kitchen door in a New Orleans home When Hurricane Katrina struck the Gulf Coast
2006年VOA标准英语（四月）
Melting Arctic Could be Major Source of Greenhouse Gases The melting arctic permafrost could release methane-producing microbes with the potential to accelerate climate change, according to a new study published in Nature. Lead author Janet Jansson,
VOA标准英语2011年(十一月)
This is the VOA Special English Health Report. Two recent studies have found that punishment is not the best way to influence behavior. One showed that adults are much more cooperative if they work in a system based on rewards. Researchers at Harvar
VOA慢速英语2009年（十）月
New Antibiotic Found in Human Noses 研究人员在人类鼻子发现新抗生素 The search for new drugs to fight infections has led to a discovery in an unlikely place in peoples noses. What researchers found in noses is a compound called lugdunin
2016年VOA慢速英语(八)月
By Cathy Majtenyi Nairobi 23 March 2007 Many people in Uganda are up in arms (very upset) about a government plan approved by the cabinet this week to clear cut about one-third of a national forest reserve for sugar cane growing. Lawyers and civic gr
2007年VOA标准英语（三月）
By Chris Simkins Washington 21 May 2008 Gun violence is on the rise in Washington. Since the first of the year, dozens of people have been murdered and wounded in a rash of shootings. With a population of over half a million people, the nation's cap
VOA标准英语2008年（五月）
The United States is taking action against three Mexican drug cartels. The news comes as President Barack Obama prepares to travel to Mexico on Thursday for talks with President Felipe Calderon. The drug-related violence plaguing Mexico, particularl
VOA标准英语2009年(四月)
International Performers Flock to Texas Music Festival Playing on Austin's club-lined Sixth Street, the British folk group Skinny Lister charms the crowd. It cost them a lot of money to come here two years in a row but group guitarist Daniel says it
VOA标准英语2013年(三月)
Lesson Fourteen 听力部分 Dictation: Please prepare your paper and pen. We keep ____ in the _________ to ______ its _______ and ___________. ________________ keep _________ and inhibit the _____ of most ______. However, ____ spoilage microorganism
王强口语 第二册
About 1500 years ago Chinese settled there, but the Dutch imperialist invaded there in the 17th century. After that, in 1662 Zheng Chenggong, a hero of nation,drove them out. Since 1683 the island was ruled by Qing Dynasty nearly two centuries. Unfor
英语作文
藻类Algae 两栖动物Amphibians 动物习性Animalbehaviour 动物资源Animalresources 节肢动物Arthropods 生物多样性Biologicaldiversity 生物资源Biologicalresources 生物圈保护区Bi
英文语法词汇
By Doug Levine Washington 01 April 2006 Many of the early pioneers of rock and roll are long gone. But for those still around, the fight to ward off imposters continues. The end may be near for these
2006年VOA标准英语（四月）
Since the April 20 explosion and fire that sank the BP Deepwater Horizon off-shore oil rig, about 800,000 liters of crude oil a day have been spewing from the broken well into the Gulf of Mexico. The massive spill is threatening marine life, commerci
VOA标准英语2010年(五)月
By Claudia Blume Hong Kong 16 November 2007 Hong Kong-based human rights groups who recently returned from a fact-finding mission to the Philippines found that the frequency of extrajudicial killings in the country has gone down. Disappearances, howe
VOA常速英语2007年（十一月）