调制光谱调制频谱modulation: n. 调整,调节;(声调的)抑扬,变化;【音乐】转调,变 ...spectrum: n. (pl. -tra ) 1.【物理学】谱,光谱;波 ...spread spectrum modulation: 扩展频谱调制spread spectrum modulation ssm: 扩频调制spread spectrum modulation technique: 展布频谱调制技术下载手机词典可随时随地查词查翻译