檔案存取資料單元 data network access unit: 數(shù)據(jù)網(wǎng)入口單元dau data access unit: 數(shù)據(jù)存取單元psdau packet switched data access unit: 分組交換數(shù)據(jù)接入單元access file: 存取存儲(chǔ)器file access: 文件存取, 文件訪問(wèn)下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯