萨斯(Cass)博士是德国和美国两所名牌大学的教授,又是瑞士、奥地利、日本、意大利、苏联和中国的客座教授.他每年往返飞越欧美大陆,访问或应邀赴上述国家讲学考察,可以说每年至少绕地球一周.称他为“多国教授”是名副其实. Dr. Cass is a professor of two prestigious universities in Germany and the United States and a visiting professor in Switzerland, Austria, Japan, Italy, the Soviet Union and China. He travels to and from Europe and the United States every year and visits or is invited to go to these countries for lectures and expositions, It can be said that at least one week around the Earth a year, calling him a “multi-country professor” is a veritable name.