单词：dvicesium
单词：dvicesium 相关文章
[00:06.37]The United States has a new official clock. [00:10.95]The clock began operating late last year in the American city of Boulder,Colorado. [00:18.39]Experts say the new clock is so exact that it will neither gain nor lose so much as one secon
美国英语听力80篇
AA: I'm Avi Arditti with Rosanne Skirble, and this week on WORDMASTER: A listener, Akbar Gandi in Iran, is asking for an explanation of countable and uncountable nouns and the difference between a name and a noun. RS: English teacher Lida Baker has t
词汇大师(Wordmaster)
Youve given some thought to oxygen, carbon, uranium. But youve probably never mused about the element ytterbium, symbol Yb. A new study by scientists at the National Institute of Standards and Technology, or NIST, says that ytterbium could find a rol
Scientific American(八)月
France, Italy to Send Military Advisers to Help Libyan Rebels NATO allies Britain, France and Italy are offering military advisers to help train Libyan rebels, as the military stalemate continues on the ground. Elsewhere, in Yemen and Syria, state cr
VOA标准英语2011年(四月)
The Obama administration appears to be sending mixed signals on whether a second stimulus package will be needed to pull the U.S. economy out of a deep and prolonged recession. Democrats and Republicans are expressing dissatisfaction with the impact
VOA标准英语2009年(七月)
By Dan Robinson Washington 07 June 2007 President Bush's nominee to be special adviser on Iraq and Afghanistan says he is concerned about the Iraqi government's capacity for political reconciliation. Lieutenant General Douglas Lute also told a Senat
2007年VOA标准英语（六月）