... 频率监别电路，监频器：frequency discriminator 频率畸变：requency distorion 频率基准：frequency standard ...
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它沿水平方向逐步扩展，通常是由低于行频的频率畸变造成的。
Typically caused by distortions to the frequency components below the horizontal line frequency.
本文讨论了离散化时需重点考虑的两个问题：采样周期的选取和频率畸变。
Two key questions, selection of sampling period and phenomenon of frequency aberrance, must be considered when the continuous notch filter is discretized.
如果探测器与火星保持静止，那么它向地球发出的信号将会产生频率畸变。由此，我们可以推算出火星轴线的扰动率。
If the rover were not moving, the frequency distortions of its signals to Earth would reveal the rate of wobbling in Mars's axis.
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