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人类充满褶皱的大脑是何等聪颖!在它的深处,蕴藏着无穷的智力宝藏。靠了它,人类已经创造了数不尽的奇迹。单说通信技术,人们利用烽火、信标、驿马等通信手段传递信息的时代自然早已成为历史,即使是近几十年间运用微波线路传递信息的手段,也因有着难以克服的缺点而显得落后了。唯有卫星通信方兴未艾,成了无线电通信的后起之秀。一件发生在地球一角的新闻,可以在极短的时间内,通过通信卫星传遍全球,而且人们可以坐在家里,看到影象,听到声音。这神奇的变化,也仅仅是近二十年间的事情。中国的航天事业起步较晚。从一九七○年春天,我国首次发射成
How clever human folds of the brain, in its depths, contains infinite treasure of intelligence. By it, mankind has created countless miracles. As long as communication technologies are used, the times when people use the means of communication such as beacon, beacon and horse stand have become history naturally. Even the means of using microwave lines to transmit information in recent decades have also lagged behind with insurmountable shortcomings It’s Only satellite communications are in the ascendant and become a rising star in radio communications. A piece of news that takes place on the corner of the globe can be circulated worldwide via communications satellites in very short periods of time, and people can sit at home, see images and hear voices. This magical change is only a matter of nearly two decades. China’s space industry started late. From the spring of 1970, our country was first launched into