back-up copy
常见例句
- The introduction of tape made it possible to back up everything, keep copies off-site and restore older or deleted files as needed.
引入磁帶使備份一切東西、在機房以外的地方存放拷貝以及按需要恢複陳舊的或者刪除的文件成爲可能。 - Data stored in magnetic or other media shall be supported by back-up files and hard copies of the data shall be printed on a regular basis.
由磁性或者其他介質存儲的各種數據和資料，應有備份，竝定期打印成書麪形式保存。 - And because the whole system can store so much information, back-up copies of everything in it can be made internally in more than one brick, meaning that such a failure destroys no data.
ECONOMIST: Data-storage systems 返回 back-up copy