keying binary frequency shiftkeying, binary frequency shift (bfsk)二进制: binary system频率变换: frequency transformation; fr ...键控: keying; manipulation频率变换键控: keying frequency shift; keying, frequency shift (fsk)二进制频率变换调制: binary frequency-shift keying (bfsk)下载手机词典可随时随地查词查翻译