备用的一份backup

充数<方>to serve as a stopgap

电脑术语。指把文件另外复制一份to back up

• 为确保个人或公司的资产得到充分保护，重要文件得到妥善保管，电脑档案应定期备份并妥善完好保存。

  To ensure that an individual's or a company's assets are adequately protected, important documents are properly safeguarded and computer files should be regularly backed up and properly saved.

• 我买回好几包软盘开始备份我的资料。

  I have bought many packs of floppy disks to make copies of my materials.