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频率是单位时间内完成振动的次数，是描述振动物体往复运动频繁程度的量，为了纪念德国物理学家赫兹的贡献，人们把频率的单位命名为赫兹，简称“赫”。Cats use a causal-rational comprehension of sounds or Appears to predict the appearance of invisible objects, lead researcher Saho Takagi st
频率是单位时间内完成振动的次数，是描述振动物体往复运动频繁程度的量，为了纪念德国物理学家赫兹的贡献，人们把频率的单位命名为赫兹，简称“赫”。Cats use a causal-rational comprehension of sounds or Appears to predict the appearance of invisible objects, lead researcher Saho Takagi st