如果有人问,什么是当今世界最大的民用产业?恐怕许多人一时都答不上来,其实它就是被称为“无烟工业”的旅游业。据联合国推荐的国民经济核算体系(SNA)进行的测算,国际旅游业与各国国内旅游业合计的总收入1990年为29000亿美元,1993年将达到近35000 If anyone asks what is the largest civilian industry in the world today, I am afraid many people will not be able to answer the question in time. In fact, it is a tourism industry known as “smoke-free industry.” According to the United Nations recommended National Accounts System (SNA) calculations, the total income of international tourism and domestic tourism in all countries was 2.9 trillion U.S. dollars in 1990, reaching nearly 35,000 in 1993