[1]石 慧 王思明.相对优势地位的转变:中美大豆发展比较研究[J].中国农史,2018,37(05):56. SHI Hui WANG Si-ming.Shift of Status:Comparative Study on the Development of Soybean in China and the United States[J].AGRICULTURAL HISTORY OF CHINA,2018,37(02):56.