backupsetbackuset备份: back-up集: gather; assemble; collect备份集分类: backu types备份集由若干个备份片: backup pieces备份: [计算机] back-up◇备份发射机 stand-by transmitter; 备份技术 redundancy technique; 备份记录 duplicate record下载手机词典可随时随地查词查翻译