“1”归零制 non-return-to-zero change-on-one: 逢1变化不归零制non-return-to-zero change: 异码变化不归零制nonreturn-to-zero change on one: 逢1变化不归零制nrzc non-return-to-zero change: 不归零变化nrz-c non return to zero change: 不归零变化下载手机词典可随时随地查词查翻译