“beat”的概念、定义、翻译、参考文献-科学参考

单词	beat
释义	beat [bēt] ^PHYSICS The periodic variation in amplitude of a wave that is the superposition of two simple harmonic waves of different frequencies.
随便看	hard hard acid hard automation hard base hard beach nine-light indicator nine's complement ninety-column card ninety-six-column card ninhydrin niningerite ninon niobe oil niobic acid niobite niobium niobium carbide nip Nipher shield Nipkow disk nippers nipping nipple nipple chaser Nippotaeniidea

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