单词：datum horizon
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本讲为2006年下半年新的教学内容，请对照教材听录音！ “They may want a health professional to open up communication for them with their loved ones or family--- there’s nearly a
自考英语（二）60讲
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These discoveries raised the stakes. Here was a planet similar to our own. Mars might not have cities or civilizations. But it could be home to other smaller life forms like microbes. Chris McKay is N
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I think it is exciting. Because it would imply that if life arose independently on Mars. The implication is that life is pervasive throughout the universe. This is why Mars has so obsessed scientists.
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For Mars to have rivers, it must once have had streams, rain, clouds and an atmosphere, a planet just like the Earth today-if these were rivers. They had to be sure. The answers would come in 1998 wit
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William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in
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Of course, any terraforming is still a long way off. The next few expeditions to Mars will definitely be made by machines. NASA, are sending 2 rovers, capable of travelling over 100 meters a day in se
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Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t
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Life on Earth is basically proteins and DNA, so we can wonder if there is life on Mars will also be DNA and proteins, the same type of DNA, the same type of proteins. One might think that DNA is such
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But there was something even better. Odyssey may not just have found ice. There may also be liquid water, and that means, there could be living creatures there too. Right now, there might be liquid wa
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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
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One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'
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Grammar Girl here. We've received several requests to address Latin plurals, so today we're going to tackle a tricky one. A listener called with this request: Hi, Grammar Girl. This is Adam from Peoria. I was wondering if you could go over the usage
英语语法 Grammar Girl
design 指“制作某物之前深思熟虑地构思”, 如: It was he that designed the garden. 这个花园是他设计的。 invent指“通过想象、研究、劳动, 创造出前所未有的东西
英文语法词汇
Everyday Grammar: Unusual Plurals 英语日常语法:不寻常的复数 One fish, two fish, red fish, blue fish, goes the Dr. Seuss childrens story. Why isnt it two fishes? You may think, Ok, its hard to count fish so we group them all together. No p
2015年VOA慢速英语(九)月
Nature reports results from GRACE, a satellite machine designed to use gravity measurement to monitor the world's water resources. GRACE is the Gravity Recovery and Climate Experiment and it's a two-satellite machine. These two satellites are followi
自然百科2010年
damage v./n. 损害 n. [pl.]损害赔偿费 damp a. 有湿气的,潮湿的 同义词：humid a.潮湿的 dangerous a. 危险的,不安全的 反义词：safe a.安全的 解析：danger n.危险 You a
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10.授课场景 (六)、学校生活之课题研究篇 部分学科名称： literature文学 philosophy哲学 history历史 art艺术 sociology社会学 linguistics语言学 psychology心理学 engineering工程学 architecture建筑学 business商务 law法学 economics经济学 finance金融学 account
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HONG KONG, July 24 (Xinhua) -- As winds from Typhoon Vicente battered Hong Kong, the Hong Kong Observatory raised Tropical Cyclone warning to the highest level of Hurricane Signal No. 10 at 00:45 local time on Tuesday (16:45 GMT on Monday). Hurricane
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By Paula Wolfson Tokyo 13 November 2009 President Barack Obama during joint news conference with Japanese PM Yukio Hatoyama, not pictured, in Tokyo, 13 Nov 2009 U.S. President Barack Obama says a decision on a revised Afghanistan strategy will come
VOA标准英语2009年(十一月)