单词：bif (banded iron formation)
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This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? We live in a nice neighborhood. Of the galaxy, that is. The sun is about halfway toward the outer edge of the Milky Way. But the sun may have migrated vast distances t
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band, [bnd] n 带，条纹＝strip；乐队；v 联合 【例】jazz band 爵士乐队We banded together against the robbers 我们联合起来对付强盗。 【类】stipple:dot＝striate:band 有点的由点组成＝有条纹的由条纹组成
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By Naomi Schwarz Northern Mauritania 17 October 2007 In arid Mauritania, where Sahara desert meets Sahel grasslands, a train stretching up to two and one half kilometers snakes along the northern border. Built to carry iron ore from mines in the nort
2007年VOA常速英语（十月）
By Alisha Ryu Mogadishu 05 January 2007 In Somalia, an alleged message from Osama bin Laden's deputy urging Somalis to launch an Iraq-style guerrilla war against Ethiopian forces there is being taken seriously by a now mostly-disbanded group of mili
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China's iron ore manufacturers say they're struggling to keep their businesses afloat because of high costs and taxes while production is on the rise for the sector's global giants. Brazil's Vale SA is the world's largest iron ore producer and it say
cctv9英语新闻2015年
TEHRAN, Oct. 18 (Xinhua) -- Iranian（伊朗） leaders on Monday urged for the quick formation of the Iraqi government, saying that will serve the interests of the Iraqi people and enable them to enjoy stability, security, unity and prosperity（繁荣
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