If you feel that copy of software is old, here's another files recoveryutility, aptly...
如果您认为复制的软件是岁，在这里的另一个文件修复工具，正好。
2
Once removed, the files cannot be undeleted, except possibly by a third-party recoveryutility.
一旦删除，文件不能撤消删除，除非可能是由第三方恢复实用工具。
3
You can either use a copy of your backup image and roll it forward to the time right before the table was dropped (point-in-time recovery), or you can restore a logical backup through the exp utility.