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汉语拼音：pín lǜ

1.单位时间内完成振动或振荡的次数或周数。常用单位是赫兹。1赫兹等于1次/秒或1周/秒。

2.某一时间内某事物发生的次数或完成某过程的次数，有时也叫频率。

1. 物体每秒钟振动的次数。单位是赫兹。

   秦牧 《艺海拾贝·放纵和控制》：“物体每秒钟震动的‘频率’过低，我们不能听到声音；‘频率’过高，我们也无法听到。”

2. 单位时间内某种事情发生的次数。如：生蛋多的鸡好动，目光敏锐，啄食的频率要比生蛋少的鸡高得多。

• Experimenters have succeeded in controlling the rate and regularity of the heartbeat.

  实验者已经成功控制了心跳的速度和频率。

• In Europe, AC is usually generated at 50 Hz.

  欧洲的交流电输出频率通常为50赫兹。

• This machine has a clock speed of 1.6GHz.

  这台机器的时钟频率为1.6千兆赫。

• As you walk faster, you will find the arms bend naturally and more quickly.

  走快时，你会发现手臂会自然弯曲，而且频率会更快。

• 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。

• 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。

• You can't hear waves of such a high frequency.

  如此高频率的声波是无法听到的。

• With this restricted frequency range it is not applicable to hydrocarbons.

  这个较紧缩的频率范围不适用于烃类.

• Its frequency response has to be flat over the whole audio range.

  它的频率响应在整个音频范围内有所下降.

• The reversion frequency is increased by the addition of mutagents.

  逆转的频率靠加入诱发变因素而增加.

• Amplifier self - oscillates at a frequency depending on the velocity of the fluid.

  放大器自激振荡的频率就取决于流体的速度.

• If the frequencies are low, this approach cannot be used.

  若频率很低时, 这种方法就不能使用.

• The Doppler frequency can be obtained as a heterodyne or beat effect.

  由于外差或频差效应,能够得到多普勒频率.

• This relation between the frequency and the field spectra was noted experimentally.

  实验上已经发现频率和场频谱之间的这种关系.

• The other circuit is designed to resonate close to the desired frequency.

  把另一线圈设计成在所有要求的频率范围内可与之谐振.