将分割镜像初始化为快照时，将执行崩溃恢复，回滚所有未提交的事务，并使数据库可以被所有读或写操作访问。
The initialization of the split mirror as snapshot performs a crash recovery, rolls back all uncommitted transactions, and makes the database available for any read or write operation.
没有一个培训期间，恢复的视觉功能定位及方法使他在房间的人自由而读大字母是一个完全后的文字数年的失明。
Without a training period, the regained visual functions enabled him to localize and approach persons in a room freely and to read large letters as complete words after several years of blindness.
大多数的最优化技术，检查点处理(聚集中间结果以便不需要读整个日志就可以恢复动作)和“边缘案例”超出了我们的范围。
Most optimizations, checkpoint processing (aggregating intermediate results so that recovery actions never need to read the entire log), and "fringe cases" are beyond our scope.
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