un. 可变消除式记录 variable erase recording: 可变消除式记录erase the recording from a tape: 抹去录音variable amplitude recording: 变幅记录variable area recording: 变面积记录; 面积可变式记录variable density recording: 变密度记录; 变密度式录音; 变密度制录音下载手机词典可随时随地查词查翻译