“front-to-back ratio”的概念、定义、翻译、参考文献-科学参考

单词	front-to-back ratio
释义	front-to-back ratio [¦frǝnt tǝ ¦bak `rā·shō] ^{ELECTROMAGNETISM} Ratio of the effectiveness of a directional antenna, loudspeaker, or microphone toward the front and toward the rear. ^{SOLID-STATE PHYSICS} Ratio of resistance of a crystal to current flowing in the normal direction to current flowing in the opposite direction.
随便看	metasicula metasideronatrite metasilicate metasoma metasomatic metasomatism metastable metastable equilibrium metastable ion metastable phase metastable state metastasis metastasize metastatic anemia metasternum metastoma Metastrongylidae Metastrongyloidea metatarsal metatarsalgia metatarsus Metatheria metathesis metathetical salts metathorax

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