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.
十八年前，Philip Morrison和GiuseppeCoccni，两位来自康奈尔大学的物理学家，致力于猜想智慧外星文明如何向地球发出信号。
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.
十八年前，Philip Morrison和GiuseppeCoccni，两位来自康奈尔大学的物理学家，致力于猜想智慧外星文明如何向地球发出信号。
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