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by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?
数学英语
This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.
Scientific American(十)月
By Nico Colombant Dakar 11 April 2008 Governments across West Africa are working hard to avoid more protests about the soaring cost of living. As VOA's Nico Colombant reports from our bureau in Dakar, governments are reducing prices where they can an
VOA常速英语2008年（四月）
SEVILLE The European Central Bank has agreed to buy government bonds from debt-ridden Eurozone countries that request help, as part of an effort to relieve pressure from soaring borrowing costs. The much-awaited announcement in Frankfurt Thursday may
英语新闻
BEIJING, Aug. 7 (Xinhua) -- A new wave of massive spending plans rolled out in recent months by local governments to boost the flagging economy has sparked concerns over wasteful investments and potential local government debt risks. Changsha, capita
英语新闻
By Luke Hunt Bangkok 05 November 2009 FAO says most countries in Europe and North America have reversed centuries of deforestation As international attention shifts to Copenhagen and the coming United Nations conference on climate change, reforestat
VOA标准英语2009年(十一月)