4Niklas Luhmann, Risk: A Sociological Theory, Berlin: de Gruyter, 1993, p. 9.
5乌尔里希·贝克.《风险社会》,南京:南京译林出版社,2003年,第19页.
6Charles Hermann, Crisis in Foreign Policy: A Simulation Analysis, Indianapolis: Bobbs Merrill, 1969, p. 14.
7E. L. Quarantelli, "Epilogue: Where We Have Been and Where We Might Go", in E. L. Quarantelli, ed. , What Is a Disaster? Perspec- tive on the Question, New York: Routledge, p. 244.