名词
中文翻译：极地信号
同义词：
['polar message', 'polarized signal']
例句：
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1.The satellite sent a polar signal to the ground station.
卫星向地面站发送了一个极地信号。
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2. The researchers detected a polar signal from the distant planet.
研究人员探测到了来自遥远星球的极地信号。
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3.The polar signal was picked up by the antenna and transmitted back to Earth.
极地信号被天线接收并传回地球。