单词	了利
释义	同CLEAR
随便看	frequency ringing--harmonic ringing frequency-rstepped waveform frequency run frequency scale frequency scan frequency-scan antenna frequency scanning frequency scan radar frequency-scan radar frequency selecting connector frequency selection frequency selective frequency-selective frequency selective amplifier frequency-selective amplifier frequency selective channel frequency selective circuits frequency-selective device frequency-selective element frequency selective fading frequency-selective fading frequency selective integrated circuit frequency selective surface frequency selective voltmeter frequency selectivity