frequency

英 [ˈfriːkwənsi]

美 [ˈfriːkwənsi]

n.  发生率; 出现率; 重复率; 频繁; (声波或电磁波振动的)频率

复数：frequencies　

CET4CET6考研IELTSGRETEM4TEM8计算机

Collins.2 / BNC.2406 / COCA.3009

牛津词典

noun

• 发生率；出现率；重复率
  the rate at which sth happens or is repeated
  1. Fatal road accidents have decreased in frequency over recent years.
     近年来致命交通事故发生率已经下降。
  2. a society with a high/low frequency (= happening often/not very often) of stable marriages
     婚姻稳定率高 / 低的社会
  3. The program can show us word frequency (= how often words occur in a language) .
     这个程序可给我们显示词频。
• 频繁
  the fact of sth happening often
  1. the alarming frequency of computer errors
     计算机出错惊人的频繁
  2. Objects like this turn up at sales with surprising frequency.
     这样的东西在拍卖会上出人意料地频繁出现。
• （声波或电磁波振动的）频率
  the rate at which a sound or electromagnetic wave vibrates (= moves up and down)
  1. a high/low frequency
     高 / 低频
• 频率（无线电信号每秒电波数）
  the number of radio waves for every second of a radio signal
  1. a frequency band
     频带
  2. There are only a limited number of broadcasting frequencies.
     只有数量有限的广播频率。

柯林斯词典

• N-UNCOUNT 频率;发生次数
  Thefrequencyof an event is the number of times it happens during a particular period.
  1. The frequency of Kara's phone calls increased rapidly...
     卡拉的电话飞速增多。
  2. The tanks broke down with increasing frequency.
     坦克越来越频繁地熄火。
• N-VAR (声波或无线电波的)频率，周率
  In physics, thefrequencyof a sound wave or a radio wave is the number of times it vibrates within a specified period of time.
  1. You can't hear waves of such a high frequency.
     如此高频率的声波是无法听到的。
  2. ...a frequency of 24 kilohertz.
     24 千赫的频率
  3. ...low frequency waves.
     低频波

英英释义

noun

• the number of observations in a given statistical category
  Synonym:absolute frequency
• the ratio of the number of observations in a statistical category to the total number of observations
  Synonym:relative frequency
• the number of occurrences within a given time period
  1. the frequency of modulation was 40 cycles per second
  2. the frequency of his seizures increased as he grew older
  Synonym:frequenceoftenness

双语例句

• The influence of EMS current and frequency on distribution of magnetic field and flow field was studied.
  分析了不同电磁搅拌电流和频率下磁场和流场的分布。
• Expenses for repairing and maintenance were reduced after the low frequency sound wave deashing device was used.
  经采用低频声波清灰装置，减少了检修和维护的费用。
• A method for identifying the instantaneous frequency of a linear time-varying structure was proposed.
  提出了一种识别线性时变结构瞬时频率的方法。
• Traffic accidents are happening with increasing frequency.
  交通事故日益频繁。
• The authors analyze the frequency characteristic of detecting circuit and prove the stability of the proposed detecting system theoretically.
  文中分析了检测电路的频率特性，且理论上证明了系统的稳定性。
• OFDM system performance is more sensitive to frequency offset and timing error than single-carrier systems.
  OFDM系统中频偏和定时误差的存在，对系统性能有很大的影响。
• N is the desired noninteger frequency divider.
  n为所要求的非整数分频值。
• Traffic accidents have decreased in frequency over recent years.
  近年来交通事故发生的频率已经下降。
• Because of their inertia, the electrons will overshoot and oscillate around their equilibrium positions with a characteristic frequency known as the plasma frequency.
  因为电子的惯性，它们将冲过平衡位置，并以特征频率围绕它们的平衡位置振荡。
• Accidents are happening with increasing frequency.
  事故频繁发生。