在过去的20世纪里,人类文明取得了巨大的进步。科学是引导文明进步的知识源泉,工程技术是推动人类文明进步的发动机。继18世纪第一次产业革命以后,19世纪末到20世纪上半叶又发生了第二次产业革命,在化工、电力、原子能和动力机械等工程技术领域中取得了新的突破,使人类进入了电气 In the past 20th century, human civilization has made tremendous progress. Science is the source of knowledge that guides the progress of civilization. Engineering technology is the engine that advances the progress of human civilization. Following the first industrial revolution in the 18th century, a second industrial revolution took place from the end of the 19th century to the first half of the 20th century, and new breakthroughs were made in engineering, technology, power, atomic energy and power machinery engineering fields, enabling humans to enter. Electrical