中文字幕精品视频在线|中文字幕在线观看|亚洲v日本v欧美v在线播放|伊人网中文字幕

<nav id="3u6n6"></nav><samp id="3u6n6"><tr id="3u6n6"><track id="3u6n6"></track></tr></samp>
    <legend id="3u6n6"><fieldset id="3u6n6"></fieldset></legend>

      
      

    1. 首頁英語詞典frequencyfrequency英英釋意

      frequency

      英 ['fri?kw(?)ns?] 美['frikw?nsi]
      • n. 頻率;頻繁

      英英釋意


      1. the number of occurrences within a given time period (usually 1 second);
      "the frequency of modulation was 40 cycles per second"
      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