副本的

He has a repetition of a previous talk.

他有前次会谈副本。

The CROSSCHECK command synchronizes the logical records of RMAN backups and copies with the files on storage media.

CROSSCHECK命令同步RMAN备份和存储介质上副本逻辑记录。

Computer viruses are small programs, they replicate by attaching a copy of themselves to another program.

计算机病毒是一些小程序，它们把自己一个副本附加到另一个程序上面进行复制。