求翻译：1981年有26亿人次参加了旅游，平均每1.77个人中有一人出游；1983年旅游人数达32亿人，平均每1.4个人中有一人出游；1984年旅游人数为40亿人次，平均每1.1个人中有一人出游。1985年世界旅游组织在马德里开会讨论本世纪旅游发展趋势时，认为1990年时，世界旅游总人数将会达到46～48亿人次。此数字与世界现有人口完全相等。这些惊人的发展数字统计，表明了旅游已成为世界上最普遍的社会潮流，旅游变成了人类生活必不可少的内容。是什么意思？

In 1981, 2.6 billion people to participate in the travel, on average every 1.77 people have one travel; 1983 tourist number for 3.2 billion people, an average of every 140 people have one travel; 1984 the number of tourists for the 4 billion people, an average of every 1.1 individuals in one trip. 1

In 1981 there were 2.6 billion passengers in the tourist, with an average 1.77 per one person in the 1983 Tour, travel up to 3.2 billion, with an average 1.4 one person in a number of people; 1984 to 4 billion, with an average 1.1 million individuals, one of whom. In 1985 the World Tourism Organizat

1981 2.6 billion people participated in the tourism, one person out of every 1.77 outings; 1983, tourist numbers up to 3.2 billion people, one person out of every 1.4 outings; 1984 number of 4 billion people, one person out of every 1.1 outing. In 1985, the World Tourism Organization meeting in Madr