new
radio (radar, celestial) navigation的英文翻譯是什麼意思，詞典釋義與在線翻譯：
英英釋義
名詞 radio:
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medium for communication
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an electronic receiver that detects and demodulates and amplifies transmitted signals
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a communication system based on broadcasting electromagnetic waves
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transmit messages via radio waves
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indicating radiation or radioactivity
