单词：truncated tip electrode
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Five Did you tip the bellboy? 你付小费给那个服务生了吗？ 1 Introduction A It is the custom to give tips to waiters in restaurants and taxi drivers. 在餐馆给服务员小费、给的士司机小费被认为是习俗。 B It is also American custom when visiting friends t
零距离美语会话
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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
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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Losing a limb is traumatic in any circumstances, but it can become a poverty trap for those without access to advanced medical care. The Indian state of Rajasthan is home to one of the world's largest charities devoted to empowering amputees by givin
VOA双语新闻 2012年1月
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
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I once read an essay by Joseph Epstein in which he describes the glee and suspense in watching a stranger read his essay． Its happened to many novelists too the coincidental （dreamed－about） situation where you encounter a stranger reading pag
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This week CNN's very own parent company, Time Warner, laid off more than 250 employees in its print division. The cuts are a part of a growing trend throughout the print media business. So are we really headed toward a day when newspapers go the way
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1. Defending his Iraq strategy, President Bush says reconstruction has been ' uneven ' but spreading economic progress is giving people hope for a democratic future. 2. The trial of Saddam Hussein and
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Ukraine Future Clouded After Two 'Elections' 两场选举之后 乌克兰未来阴云密布 LONDON After the recent completion of elections in Ukraine there was hope the conflict in the east would ease, but that has not happened. Military convoys fro
VOA标准英语2014年(十一月)
美国众议院无条件通过债务上限法案 WASHINGTON, Feb. 11 (Xinhua)-- U.S. House of Representatives on Tuesday approved a bill with no provisions attached to extend the limit on the federal government's borrowing authority. The legislation,
英语新闻
美国众议院通过清洁债务上限法案 WASHINGTON, Feb. 11 (Xinhua)-- U.S. House of Representatives on Tuesday approved a bill with no provisions attached to extend the limit on the federal government's borrowing authority. The legislation, ap
英语新闻
两场选举之后 乌克兰未来阴云密布 After the recent completion of elections in Ukraine there was hope the conflict in the east would ease, but that has not happened. Military convoys from Russia are flowing into rebel-controlled areas aga
VOA双语新闻 2014年11月
Galaxies could in a way, be much bigger than they currently are. Something is stopping them growing larger and that something is the black hole at the center. Now this is bizarre because the ration of the size of the black hole to the size of the gal
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