Cocconi and Morrison guessed that the aliens would choose a frequency that would mean something to creatures who know math and chemistry.
Cocconi和Morrison猜测外星人会选择对于拥有数学和化学知识的生物有意义的频率。
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Eighteen years earlier, two Cornell physicists, Philip Morrison and Giuseppe Cocconi, had tried to imagine how an intelligent alien civilization might try to signal Earth.