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frequencies是什么意思

frequencies

美['frɪkwənsɪz]  英['frɪkwənsɪz]
n.  频率
sp.  名词frequency的复数形式.

英英释义

名词frequency
  1. the number of occurrences within a given time period
  2. the ratio of the number of observations in a statistical category to the total number of observations
  3. the number of observations in a given statistical category

例句

用作名词(n.)
  1. At some frequencies, it can penetrate walls.在一些频率,它能穿透墙壁。
  2. Confined waves have definite frequencies.被限制的波具有确定的频率。
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