They suggest that any alien civilisation worth its salt would alight not on the photons of the electromagnetic spectrum-whether optical or radio-frequency-to send messages to other solar systems.
他们指出，任何有头脑的外星文明都不会发射电磁波谱中的光子——无论是可见光波段还是射频波段——向另一个太阳系传送信息。
He has had three jobs in the past year, and all his employers have said the same thing-he's lazy, he refused to learn, and he is not worth his salt at all.
他去年有三分工作，但是他的所有老板都一致认为——他懒散，不愿意学习，实在没有一点雇用价值。
He has had three jobs in the past year, and all his employers have said the same thing-he's lazy, he refused to learn, and he is not worth his salt at all.
他去年有三分工作，但是他的所有老板都一致认为——他懒散，不愿意学习，实在没有一点雇用价值。
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