人们对机械工程科学本身作了许多研究,但对从事机械工程的人却研究得很不够。这也许是机械工程长期以来发展缓慢、水平不高的一个根本原因。我们对机械工程这个“物”、对其技术很肯下功夫,也舍得花钱,而对管、用这些装备的人,既不大愿意下功夫,也舍不得花钱。这是一个很大的失误。我们不妨借鉴一下发达国家的经验。美国从1900～1959年的60年间对物质资源的投资增 People have made many studies on the science of mechanical engineering itself, but they have not studied enough for those engaged in mechanical engineering. This may be a fundamental reason for the slow development of mechanical engineering over a long period of time. We are very willing to work hard on this “material” of mechanical engineering and its technology, and are willing to spend money, and those who manage and use these equipment are not willing to work hard and are reluctant to spend money. This is a big mistake. We may wish to learn from the experiences of developed countries. U.S. Increase in Investment in Material Resources During the 60 Years from 1900 to 1959