介绍了钱学森先生在近代力学和技术科学发展中的贡献，特别是介绍了他为实现超声速飞行和火箭技术在一系列关键问题上所做的贡献。在研究过程中他不断开创出工程控制论、物理力学和喷气推进学等新的技术科学，从而促进了航空航天技术的飞跃发展。我们要学习体现在他身上的超前意识和务实精神，学习、理解并大力开展他所倡导的技术科学的研究工作。

The contributions by H. S. Tsien to modern mechanics and engineering sciences, especially his work on a series of key problems in aerodynamics, solid mechanics and jet propulsion, are introduced. Through his work, many new branches of engineering sciences were established, such as engineering dybernetics, physical mechanics, jet propulsion science, etc. The embodied foresight and realistic spirit are highlighted. Today in China, it is of great practical significance to advocate and carry forward his noble spirit, and to strengthen the research and development in the field of engineering sciences.