一、历史的回顾在党的领导下,在力学工作者的努力下,从第一届理事会起,到现在二十五年来,我国力学界发生了很大的变化,这个变化是可喜的变化。我们力学工作者的队伍扩大了。人的变化是最根本的。没有人什么也干不了。第一次会议时,曾做过一些调查,大概那时从事力学工作的不到一千人,而且其中的大多数 I. Historical Review Under the leadership of the party and with the efforts of the mechanics, from the first council, great changes have taken place in the mechanics community in our country over the past 25 years. This change is a welcome change . The ranks of our mechanics have expanded. Human change is the most fundamental. No one can not do anything. At the first meeting, some surveys were conducted, probably less than a thousand at that time, and most of them