短語詞組短語amplitude vers frequency characteristic 幅頻特性amplitude versus frequency characteristic 幅度;頻率特性曲線amplitude e frequency characteristic 振幅頻率特性amplitude -frequency characteristic curve 幅頻特性曲線amplitude phase frequency characteristic 幅相頻率特性amplitude and frequency characteristic 幅頻特性AFC Amplitude -frequency characteristic 振幅頻率特征amplifier amplitude -frequency characteristic 放大器幅頻特性 返回 amplitude frequency characteristic