“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	escape velocity escape wheel escaping tendency escar escarpment eschar escharotic Escherichia Escherichia coli Escherichieae Eschka mixture eschwegeite Eschweiler-Clarke modification eschynite Esclangon effect E scope escort fighter escribed circle esculin esculoside escutcheon escutcheon plate ESD ESDI eserine

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