That's one way that an extraterrestrial civilization can send a signal that stands up above the radio background noise.
这是外星文明可以突出于宇宙的无线电背景噪声发送信号的一种方式。
That's one way that an extraterrestrial civilization can send a signal that stands up above the radio background noise.
这是外星文明可以突出于宇宙的无线电背景噪声发送信号的一种方式。
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