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笔者于1981-1983年间在美国进修,先后在密苏里-罗拉大学(University ofMissouri-Rolla)、美国地质调查所地球物理分部(Branch of Geophysics,UnitedStates Geological Survey)及蒙特仪器公司(Mount Sopris Instrument Company)
The author studied in the United States from 1981 to 1983 and studied at the University of Missouri-Rolla, the Branch of Geophysics, the United States Geological Survey and the Mount Sopris Instrument Company.