英语词汇“round-the-world echo”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	round-the-world echo
释义	round-the-world echo round-the-world echo [′rau̇ndthə ′wərld ′ek·ō] (communications) A signal occurring every ¹⁄₇ second when a radio wave repeatedly encircles the earth at its speed of 186,000 miles (300,000 kilometers) per second.
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