| 术语 | retention period |
| 释义 | retention period 保存［生存］期；［保持期间］ 1. The length of time for which data on a data medium is to be preserved. 数据在数据媒质中保存的时间。 |2. In data security, the length of time for which a file is to be kept before it is overwritten. The retention period and the date on which the file was written are used to calculate the earliest date on which the file expires. The time the file was written and the retention period or the expiry date will be written as part of the file label and will be used as a security precaution against the accidental destruction of a file. 在数据保密学中，文件被重写前所保持的时间长度。用生存期和文件建立时间可以计算文件的最早消亡时间。文件建立时 间及生存期或文件消亡时间写入文件卷标中，用作防止偶然错误损坏文件时的预警信息。 |
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