“artificial echo”的概念、定义、翻译、参考文献-科学参考

单词	artificial echo
释义	artificial echo [¦ärd·ǝ¦fish·ǝl `ek·ō] ^{ELECTROMAGNETISM} 1. Received reflections of a transmitted pulse from an artificial target, such as an echo box, corner reflector, or other metallic reflecting surface. 2. Delayed signal from a pulsed radio-frequency signal generator.
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