我们没有计算机备份，只得靠落后的纸档案重做记录。
We had no computer backup and had to rely on old paper files to reconstruct the records.
基本意思如下对于重做记录，在相应的事务被提交之前，也能被写入重做日志文件。
Redo records can also be written to a redo log file before the corresponding transaction is committed.
否则交易复苏（回滚）将是不可能的，因为重做需要撤消改变总是在同一重做的重做记录的变化本身。
Otherwise transaction recovery (rollback) would not be possible, because the redo needed to undo a change is always in the same redo record as the redo for the change itself.
例如如果重做日志缓冲满了，或者有其它的事务提交了。LGWR进程会把所有在重做日志缓冲中的重做日志事项写入重做文件，即使是一些重做记录可能还没有提交。
If the redo log buffer fills, or another transaction commits, LGWR flushes all of the redo log entries in the redo log buffer to a redo log file, even though some redo records may not be committed.
让他们惊喜的是，这所学校对学生的身高以及体重做了详尽的记录，每周还会做声音测试记录是否有任何故意的假声。
To their delight, they were told that the school had kept meticulous records of children's height and weight, and made weekly voice assessments to record any unintentional falsettos.
在重做日志记录达到缓冲区的三分之一。
The redo log buffer is one-third full or contains 1 MB of buffered data.
在重做日志记录达到缓冲区的三分之一。
The redo log buffer is one-third full or contains 1 MB of buffered data.
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