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电波通信的缺点人们猜测,在浩瀚宇宙的某处,也许存在着和我们人类社会相类似的文明社会或更高级的社会。探索地球外文明社会的尝试,约在20年前就已开始了。迄今为止所进行的十几次探索计划都把希望寄托在接收外星球发来的电波上。理由的根据是:第
Disadvantages of radio communications People have speculated that somewhere in the vast universe there may be a civilized society or a higher society similar to our human society. Attempts to explore a civilized society outside Earth began about 20 years ago. More than a dozen exploration projects so far have pinned their hopes on receiving radio waves from alien planets. The rationale is based on: