Lost of a control file with no backup.

没有备份的控制文件的丢失。

Lost of online redo logs before they are archived.

在对联机重做日志进行归档之前，这些日志丢失了。

Lost of archived redo logs preventing a roll forward beyond that point.

防止出现超越某一时间点前滚的归档重做日志的丢失。

Active logs are logs that prevent lost of data during crash recovery such as power failure.

活跃日志防止在崩溃恢复(比如电源故障)期间的数据损失。

A complete recovery is a recovery that involves rolling forward the logs to bring the database to the most current time with no lost of data.

完全恢复是包括将数据库恢复到最近时间的前滚日志并且没有数据丢失的恢复。