美国是世界上科学技术最发达的国家，这是和美国崇尚发明创造的社会风气分不开的。在历届美国总统当中，有四位总统对发明情有独钟。这几位政界要人对发明的特殊爱好，被人们传为美谈。美国首任总统乔治·华盛顿，在青年时期曾经有过好几项发明，虽然他在任总统期间闭口不谈此 The United States is the most advanced country in science and technology in the world. It is inseparable from the social atmosphere advocated by the United States for invention and creation. Among the successive U.S. presidents, four presidents are fond of inventions. These special political figures who have a special interest in invention have been proclaimed as “beautiful talk.” George Washington, the first president of the United States, had had several inventions in his youth. Although he was silent on his term as president