frequency

noun

1. 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。
2. 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。
3. （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
4. 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。

1. N-UNCOUNT 频率;发生次数
   The frequency of 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。
2. N-VAR (声波或无线电波的)频率，周率
   In physics, the frequency of 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

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。
3. You can't hear waves of such a high frequency.
   如此高频率的声波是无法听到的。
4. Their instruments detected very faint radiowaves at a frequency of 3 kilohertz.
   他们的仪器检测到一个3千赫的微弱无线电波。
5. Speech is made up of sound waves that vary in frequency and intensity.
   语音是由不同频率和强度的声波组成的。
6. Sound waves, light waves, and radio waves have a certain frequency, or number of waves per second.
   声波、光波或无线电波等都有特定的频率，或者说是每秒的波数。
7. Accidents are happening with increasing frequency.
   事故频繁发生。
8. 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。
9. Purpose: audio frequency low power amplifier, driver stage amplifier, switching applications.
   用途：用于音频小功率放大，激励级放大及开关电路。
10. N is the desired noninteger frequency divider.
    n为所要求的非整数分频值。
11. Traffic accidents are happening with increasing frequency.
    交通事故日益频繁。
12. The frequency of his visits annoyed her.
    她对于他的频繁来访感到厌烦。
13. 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。
14. When a number of certain static images, such as geometric figures, for example, interchange with a specified frequency, it creates something like a motion picture effect.
    当一组特定的静态图像，例如几何图形，以指定的频率切换，便会产生某种动态图片的效果。
15. It's common to think that the processor frequency determines performance.
    通常我们都认为是处理器的频率决定了性能的高低。
16. More complex methods such as frequency weighting and frequency normalization go beyond the scope of this article.
    更复杂的方法，比如频率加权和频率归一化，超出了本文范畴。
17. Continuous testing encompasses both breadth and frequency.
    持续测试包括了广度和频度。
18. A kind of high frequency pulse electrical source at the need of electromagnetic ultrasonic experiments is presented.
    针对电磁超声实验对脉冲电源的需求，研制了一种高频脉冲电源。
19. It has a rather high transmission frequency and low attenuation.
    具有较高的传输频率和较低的衰减。
20. 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。
21. 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。
22. The center frequency tunability characteristic of the filter is investigated as well.
    研究了该滤波器的中心频率的可调谐特性。
23. This is the angle of frequency.
    这是频率角度。
24. Analysis and Comparison of Harmonic Wave Filter Method in Electric Power Frequency Communication
    工频电力通信中谐波滤除方法的分析和比较
25. Development trend of power supply for electrostatic precipitator is discussed according to the characteristics of high frequency power supply.
    文中根据高频电源的特点讨论了静电除尘器供电电源的发展趋势。
26. But add to BB or changed body of human body, twinkle frequency is abnormal.
    但加到BB或变了身的人身上，闪烁频率就很异常了。
27. 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。
28. This article proposes one practice case for a satellite frequency spectrum monitor system.
    提出了一种卫星频谱监测系统的实践案例。
29. 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。
30. 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。

noun

1. the number of observations in a given statistical category

   Synonym:    absolute frequency

2. the ratio of the number of observations in a statistical category to the total number of observations

   Synonym:    relative frequency

3. 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