【答案解析】Ladies and Gentlemen, welcome to the second Catering Expo. The Expo is an important showcase that is helpful to pushing forward the exchanges in catering culture between China and the rest of the world. With thousands of years of history, the catering industry in China boasts an extensive, profound and long-lasting culture. In recent years there have been increasingly frequent commercial and cultural exchanges between China and other countries in the world. To some extent, the eastern and western catering cultures are also integrating with each other. //
The Catering Expo will not only be a national event popularizing the Chinese catering culture, but also a stage showcasing the traditional national culture of China as an ancient civilization and a big nation in terms of fine cuisine. We believe that through the concerted efforts of all government departments, industry organizations, and the Chinese and foreign catering enterprises, and the support and assistance of friends from the media, the 2nd China Catering Expo will definitely be a great success. [解析]
女士们，先生们，欢迎参加第二届餐饮博览会。餐饮博览会是推动中外餐饮文化交流的重要窗口。餐饮业在我国已有几千年的历史，中华餐饮博大精深，经久不衰。近年来，中国与世界各国的经济文化交流日益频繁，东西方餐饮文化也在一定程度上得到融合。//
此次餐饮博览会不仅是一次弘扬中华餐饮文化的全国性盛会，更是一个文明古国、烹饪大国向世人展示民族文化的舞台。我们相信，通过政府部门、行业组织的共同努力，通过中外广大餐饮企业的积极参与，特别是新闻界朋友们的支持和帮助，第二届餐饮博览会一定会取得圆满成功!

【答案解析】Paper making marked a preeminent invention of the ancient Chinese working people. Prior to its invention, the Europeans wrote on sheepskin, while the Chinese resorted to bamboo, wood and silk cloth. In the Eastern Han Dynasty, Cai Lun assimilated the previous experiences and carried out many experiments. Eventually he invented a new kind of paper, making full use of scrap materials including bark, worn cloth, fishing nets, etc. Thus, the source of raw materials was enlarged and the cost was reduced.
Cai Lungs new technique spread quickly, and he was recognized by the later generations as the inventor of paper. By the Jin Dynasty, paper was widely used, taking the place of bamboo slips and silk cloth. During the sixth century A. D. the Chinese paper making technique spread to Korea, Japan and Europe. The production of paper provided a most advantageous condition for the flourish of education, politics, commerce, etc, at that time. [解析]
造纸是中国古代劳动人民的著名发明。在这之前，欧洲人在羊皮上写字，中国人在竹子、木头和丝布上写字。在东汉，蔡伦集先前经验，做了许多试验。最后他充分利用了多种碎料，如树皮、旧布、渔网等，终于发明了一种全新的纸。这样，拓宽了原材料的来源，降低了成本。//
蔡伦的新技术迅速传开，他被后世认为是纸的发明者。到了晋朝，纸被广泛使用，取代了竹片和丝布。六世纪，中国的造纸术传到韩国、日本、欧洲。纸的产生为当时教育、政治、商业等的繁荣提供了最有利的条件。