To achieve the same extraction time, the amplitude of the ac voltage in the resonance frequency can be less than that of the DC voltage with one order of magnitude.
若达到同样的引出时间，共振频率的交流电压的幅度可比直流电压值小一个量级。
The magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded on a seismogram at a certain period.
地震级别是根据某一时期震动图记录的地震波振幅的对数值计算的。
The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.
调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
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