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美苏等工业国家早已开始竟相发展空间技术,25年来(1961～1983年)在空间开发和应用上耗资4000亿美元。其中,美国利用土星等四种类型运载火箭,1964年发射了第一颗对地静止通信卫星,1966年首次实现轨道对接,1969年宇航员第一次登上月球,1981年进行第一次可重复使用型载人飞船飞行等共耗资1400亿美元;苏联利用质子号等六种运载火箭,1957年发射了第一颗人造地球卫星,1961年进行了第一次载人空间飞行,1982年4月又发射了新
The industrial countries such as the United States and the Soviet Union have already started to develop space technology in their own right. For 25 years (1961-1983), they spent 400 billion U.S. dollars in space development and application. Among them, the United States used four types of launch vehicles, including Saturn. The first geostationary communications satellite was launched in 1964 and the orbital docking was first achieved in 1966. The astronauts first ascend the moon in 1969 and the first time in 1981 Reusable manned spacecraft and other costs a total cost of 140 billion US dollars; the Soviet Union, the use of protons and other six types of launch vehicle launched in 1957, the first man-made earth satellite in 1961 for the first manned space flight in 1982 4 Month has launched a new