单词：subsurface progressing cavity pump
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Are You Progressing with Progressive Tenses? Editors note: This is the second of a four-part series on verb tenses. Click here to see part one. For VOA Learning English, this is Everyday Grammar. Today we are going to look at the progressive verb ten
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今天要学的一个词是：pump。pump，Pump一般是指泵，或抽水机。可是今天讲的pump是指汽车加油站的泵。英国石油公司宣布停止在阿拉斯加的石油开采，《洛杉矶时报》的标题说：Oilfield Closure t
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By Daniel Schearf Islamabad 17 December 2007 A top American general has said Afghanistan's security is improving, despite a resurgent Taliban and increased violence in the country. The general also cited a drop in cross-border attacks and the capture
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MADRID, May 9 (Xinhua) -- China's top tennis player Li Na was focused on the job in hand after defeating Angelique Kerber in the last 16 of the Madrid Open tournament on Wednesday. Li's win over the player who had beaten her in Indian Wells earlier i
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