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当苏联发射第一颗卫星时,美国曾受到了技术上的强烈冲击。在那种冲击中,最令人感到啼笑皆非的事实是,本来美国陆军能够提前好几个月轻而易举地用丘辟特-C火箭把它的卫星发射上去,但没有这样做,而是等到最后为了对苏联的卫星作出反应,还是用它把“探险者-1号”射入了轨道。造成这种迟缓的原因多少有些是出于理想主义的考虑,即打算用专门研制的“先锋号”火箭来发射第一颗卫星。虽然,这枚火箭是由美国海军研制的,但它是一项纯研究性的计划,没有采用弹道导弹的第一级。因此,把它献给1957-1958年世界国际地球物理年,看来,这是政治上更容易接受的
When the Soviet Union launched the first satellite, the United States had suffered a severe technical attack. The most ironic fact of that shock was the fact that the United States Army had easily and easily launched its satellite with the Qiaopute-C rockets for months in advance, but did not do so, but waited until finally Soviet satellites responded, or use it to “explorer-1” into orbit. The reason for this delay is somewhat more or less idealistic, in the sense that it intends to launch the first satellite using a specially developed Pioneer rocket. Although the rocket was developed by the U.S. Navy, it is a purely research program that does not use ballistic missile first class. It therefore seems politically more acceptable to dedicate it to the World International Year of Geophysics 1957-1958