在20世纪70年代,美国对科学技术逐渐变得失去信心了,甚至是那些曾经给整个国家带来过成功的科学技术。从美国大轿车到宇航员从月球安全返回,我们对所取得的成就都提出了质疑。这里有许多原因:汽车、核电力和能源工程给环境带来有害影响;越南战争的失败表现为—个农村妇女用步枪摧毁了数千万美元的飞机和直升机。 In the 1970s, the United States gradually became less confident in science and technology, even those science and technology that had once brought success to the entire country. From the safe return of American cars and astronauts from the moon, we have all questioned the achievements we have made. There are many reasons here: cars, nuclear power and energy projects have a detrimental effect on the environment; the Vietnam War failed as a rural woman who destroyed tens of millions of dollars in aircraft and helicopters with rifles.