He went to Nurnberg-Erlangen University in Germany as a visiting scholar from 10, 1984 to 10,1986, from 11, 1990 to 6, 1991, and to Maryland University, U.S.A from 12, 1994 - 4, 1995.是什么意思_He went to Nurnberg-Erlangen University in Germany as a visiting scholar from 10, 1984 to 10,1986, from 11, 1990 to 6, 1991, and to Maryland University, U.S.A from 12, 1994