“permanent echo”的概念、定义、翻译、参考文献-科学参考

单词	permanent echo
释义	permanent echo [`pǝr·mǝ·nǝnt `ek·ō] ^{ELECTROMAGNETISM} A signal reflected from an object that is fixed with respect to a radar site.
随便看	periclasite periclinal periclinal chimera pericline pericline ripple mark pericline twin law pericolitis pericondensed polycyclic pericoronitis pericranium pericronus pericycle pericyclic reaction pericynthion pericystium pericyte periderm peridium peridot peridotite peridotite shell peridynamic loudspeaker perifollicular perigalacticon perigean range

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