单词：frame deflection
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By Michael Bowman Washington 30 April 2006 Secretary of State Condoleezza Rice has accused Iran of
2006年VOA标准英语（四月）
As it ages white paper turns a distinctive yellow. But why? To find out, scientists artificially aged modern paper to reveal the changes on the molecular level. The research is in the Journal Physical Review Letters. For 48 days, three unbleached pap
Scientific American(四)月
This is Scientific American 60 second Science I am Sophie Bushwick, got a minute? As it ages, white paper turns a distinctive yellow. But why? To find out, scientists artificially aged modern paper to reveal the changes on the molecular level. The re
Scientific American(四)月
By Bill Gasperini Moscow 17 January 2006 Russian Foreign Minister Sergei Lavrov Russian Foreign Minister Sergei Lavrov says a diplomatic solution could end the standoff with Iran over its nuclear prog
2006年VOA标准英语（一月）
In this photo taken 05 Aug 2005, an S-300 surface-to-air missile blasts off at the Ashuluk firing range, in Astrakhan region, 1280 km south of Moscow, Russia. The S-300 , similar to the US Patriot missile, is capable of shooting down aircraft, cruise
VOA标准英语2010年(二月)
Parliament Speaker Ali Larijani says hope remains for a diplomatic solution to the international dispute over his country's nuclear program Elizabeth Arrott | Cairo 30 November 2009 Iranian parliament speaker Ali Larijani speaks with media, during hi
VOA标准英语2009年(十二月)