◎ 频谱 pínpǔ
[frequency spectrum] 任何复杂振荡都可分解为许多不同振幅和不同频率的谐振荡,这些谐振荡的幅值按频率排列的图形称为频谱

1.frequency spectrum; frequency content; spectrum; power-density spectrum; power spectrum; {系统} spectral density