The component having the lowest frequency in a complex vibration (fundamental frequency or first harmonic).
复杂振动中频率最低的成分(基频或一次谐波)。
2
It is usually composed of passive elements and harmonic sources which make the power phenomena in such a circuit much more complex than that in a linear circuit.
这种等效电路通常是由谐波电源和无源元件组成，这一等效电路产生的功率现象要比线性电路复杂得多。
3
A complex signal comprising several simple harmonic components is analyzed to check the performance of this Digital Filter software.