单词：procedure work log system
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By Robert Raffaele Washington 27 March 2008 A new type of surgery may make it easier for patients who would otherwise require a more invasive procedure. The new type of operation makes it possible for doctors to remove unwanted tissue through a patie
VOA标准英语2008年（三月）
Active MRI Shows How Joints Work 活动核磁共振成像显示身体关节如何运作 Since its introduction in the 1980s, magnetic resonance imaging machines, commonly known as MRI scanners, have become a highly valuable tool in diagnostic medicin
VOA标准英语2014年(三月)
US, Russian negotiators expect an agreement on a new follow-on treaty to the 1991 START-1 pact by the end of the month Andr de Nesnera | Washington 06 December 2009 Former President of the Soviet Union Mikhail Gorbachev (L), former US President Georg
VOA标准英语2009年(十二月)