“round-trip echoes”的概念、定义、翻译、参考文献-科学参考

单词	round-trip echoes
释义	round-trip echoes [`rau̇nd ¦trip `ek·ōz] ^{ELECTROMAGNETISM} Multiple reflection echoes produced when a radar pulse is reflected from a target strongly enough so that the echo is reflected back to the target where it produces a second echo.
随便看	dotter double-acting double-acting compressor double-acting hammer double-acting pawl double action double-action die double-action forming double-action mechanical press double aging double altitudes double-amplitude-modulation multiplier double arcing double armature double-base diode double-base junction diode double-base junction transistor double-base rocket propellant double-beam cathode-ray tube double-beam spectrophotometer double beta decay double-bevel groove weld double-blind sample double-blind technique double block and bleed system

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