信号
xìnhào
signal
In a story
太空太大，信号太弱，所以人类在月球上放了这个站。Space is too vast and signals too weak, so humans had placed this station on the Moon.月球中继站 · The Relay Station · HSK 5
它的任务很简单：把地球发来的信号传递给更远的飞船。Its task was simple: to pass the signals sent from Earth on to ships further away.月球中继站 · The Relay Station · HSK 5
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