spectrum

• 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。
• A star that has this kind of spectrum reveals at once something of its structure .
  具有这种光谱的恒星，马上就展示出它的一些结构。
• Several different names have emerged to characterize different parts of the spectrum .
  几个不同的名称用来表示电磁波谱的不同部分。
• Trade integration is part of the larger spectrum of types of economic integration .
  贸易一体化是范围较大的各种经济一体化的一部分。
• It is possible to describe the excitation spectra in terms of elementary modes of excitation .
  可以借助于基本激发模式来描述激发谱。
• Motion of a star across the line of sight causes no change in its spectrum .
  恒星横越视线方向的运动，在它的光谱中不会引起什么变化。
• We begin to see, from this material, how to visualize a waveform from its spectrum .
  从这些分析中初步看到，如何从它的谱构思出该波形来。
• It includes the stipulation that the phase spectrum over that range should be a straight line .
  它包括了在该范围上相位谱应为直线的规定。
• Experimental configurations for measuring and displaying these spectra are sketched in figure 13.7 .
  测量和显示这几种频谱的实验装置见图13.7。
• Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness .
  旋涡星云因为非常暗，难以得到它们的清晰的光谱。