单词：classen's electrode
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EXPLORATIONS - Isaac Newton: One of History's Greatest Scientists By Marilyn Christiano and Frank Beardsley Broadcast: Wednesday, October 19, 2005 (MUSIC) VOICE ONE: This is Shirley Griffith. VOICE TW
Explorations
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用Mp3背六级单词
This is Scientific American's sixty seconds science, I'm Christopher Intagliata. Got a minute? Instead of installing solar paint on your roof how about just giving a house new paint job of cause you'd have to sure to use solar paint. That's what to a
Scientific American(十二)月
第13单元 六年级的自然科学课 Six grade science teacher Mr. Sampson asks his class: 六年级的自然科学老师桑普森先生问班上同学： Who can tell me which organ of the human body expands to 10 times its usual size whenstimula
英语小达人
[ti:UNIT 1 Me and My Class Lesson 7:Jenny's Week] [0:00.754]UNIT 1 第一单元 [0:02.582]Me and My Class 我和我的班级 [0:04.756]Lesson 7: 第7课： [0:06.324]Jenny's Week 珍妮的一周 [0:08.027]Date: 日期： [0:08.968]September 10 9月10日
河北教育初中英语（初中起点）八年级上
Bacteria Discovered To Recharge Cell Phone A microbe called Rhodoferax Ferrireducens，found in the mud at Oyster Bay，Virginia，has been discovered to transfer electrons directly onto an electrode
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Time for M.I.T.s Clean Energy Prize. The annual competition gives teams of university students a chance to compete for $200,000 to kick-start their new clean energy business. One finalist designed a compression technology for natural gas wells that w
60秒科学
This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan
Scientific American(八)月
(MUSIC) That July was the hottest month ever in West Virginia. Many workers became tired and weak in the heat. John Henry was concerned his friends might lose their jobs. So, he picked up their hammers and began doing their work. One week, he did his
英语杂谈
(MUSIC) Today we tell a traditional American story called a tall tale. A tall tale is a story about a person who is larger than life. The descriptions in the story are exaggerated much greater than in real life. Long ago, the people who settled in un
英语杂谈
California Seeks China's Help in Going Green From VOA Learning English, this is the Technology Report. California Governor Jerry Brown wants to increase partnerships between his state and China. The governor traveled to China last week to seek Chines
2013年VOA慢速英语(五)月
Scientists Help US Science Teachers in the Classroom Students in the United States in their last year of high school are not performing as well on the same science tests as their peers in many other countries. Educators say there should be more empha
VOA标准英语2011年(十一月)
Africa's First Ladies Promote Women's, Children's Health The risk of death from childbirth is still very real for women in countries throughout Africa. Whether their children will reach adulthood is another worry. The first ladies of Guinea, Mali, Mo
VOA标准英语2013年(四月)
AMERICAN MOSAIC -March 22, 2002: VOA's Maurice Joyce remembered / Grand Central Terminal in New York / Oscar-nominated songs HOST: Welcome to AMERICAN MOSAIC —.. VOA’s radio magazine in Special En
American Mosaic
French Class Connects Haitian Children with Their Heritage The U.S. state of Florida is home to one of the largest Haitian communities outside the Caribbean nation. The city of Miami even has a neighborhood known as Little Haiti, where Haitians maint
VOA标准英语2011年(十一月)
Enam: Katia, what are the environmental problems in your country? Katia: Well, I can think of three problems. One is water drought. The scarcity of water. Second, we have a lot of air pollution, and third a lot of deforestation. Enam: OK, so can you
原版英语对话1000个
Katia: So, Enam, let's talk about environmental problems of our countries. In Bangladesh, what is an environmental problem? Enam: Actually, we have a lot of environmental problems in Bangladesh but mainly I'd say the soil contamination is quite bad,
原版英语对话1000个
Dai: So Darren, its not long now until Christmas, are you looking forward to it? Darren: Yes and no. I do like Christmas, the spirit of Christmas, I believe it does bring people closer together, but the thing I find year upon year is becoming more an
原版英语对话1000个
Yemen plane's black box located 也门飞机黑盒子已找到 One of the black box flight recorders from the Yemeni plane which crashed in the Indian Ocean on Tuesday has been located, a French official has said. Efforts to retrieve （取回，恢复） the record
英语新闻
BEIJING, June 1 (Xinhua) -- Welfare activities and projects initiated for children swept across China on Friday, International Children's Day. A free lunch for poor pupils online fund raising scheme led by domestic web search giant Baidu called for n
英语新闻