尊敬的各位领导、各位老师、同志们、朋友们 :世纪之交 ,千年更迭 ,值此盛日 ,中国高等学校自然科学学报研究会第 4次会员代表大会在我校隆重开幕。在此 ,我代表西北大学全体师生向大会表示热烈祝贺 ,并向来自全国各地的学报代表表示热烈的欢迎 !西北大学创建于 1 91 2年 ,迄今 Distinguished leaders, teachers, comrades and friends: At the turn of the century, the millennium changes, on the heyday, the 4th Congress of the Research Association of Natural Science Journals of Chinese Universities and Colleges was grandly opened in our school. Here, on behalf of all Northwest University teachers and students, I would like to extend my warmest congratulation to the General Assembly and extend a warm welcome to all the journalists from all over the country. Northwestern University was founded in 1919 and has so far