frequencies

• 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 main effect is to raise the fundamental slosh mode frequency .
  主要作用是提高基本的晃动频率。
• The superficial layers are often frequency selective to transmission .
  表层传播一般都有频率选择性。
• It includes topics such as spatial frequency filtering, holography .
  它包括空间频率滤光、全息摄影。
• It was used as a frequency divider and no numbers are decoded from it .
  它被用作无解码输出的分频器。
• The size of the package in use determines the frequency of doffing .
  所用卷装的尺寸决定了落纱的次数。
• 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。
• The waveform is onticeably less rich in the higher frequency .
  这样的合成波形明显地缺乏较高的那一频率。
• The doppler frequency is a function of the two scattering directions .
  多普勒频率是两个散射方向的函数。
• Low and intermediate frequency instability models are taken up first .
  首先处理低频和中频不稳定性的模型。