《英汉医学词典》nominal upper and lower cut off frequencies 额定上下限截频 nominal cut-off frequencies: 额定截频nominal cut off frequency: 额定截止频率nominal cut-off: 额定截频nominal cut-off frequency: 标称截止频率; 额定截止频率lower cut-off frequency: 低限截止频率下载手机词典可随时随地查词查翻译