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笔者于1990年10月4日至1991年1月11日,参加中国贵州赴美实习培训团,赴美国爱达荷大学农学院学习了美国农业经济综合
The author from October 4, 1990 to January 11, 1991, to participate in the China Guizhou trainee training group went to the University of Idaho Agricultural College to learn the United States agricultural economy comprehensive