词汇	standards for defining
释义	standards for defining 划分指标体系
随便看	noise-free feedback noise free light noise-free light noise-free line printer noise-free operation noise free picture noise-free picture noise free receiver noise-free receiver noise-free seismogram noise-free signal noise frequency noise frequency-modulated signal noise frequency modulation noise frequency modulation interference noise frequency modulation jammer Noise-frequency modulation jammer Noise Frequency Modulation Jamming noise frequency modulation signal noise-frequency response noisefrequency spectrum noise frequency spectrum noise frequency spectrums noise fringe noise from clutter