对数据进行加密之后，清单6中的代码读回加密后的事件文本。
After encrypting the data, the code in Listing 6, below, reads the encrypted event text back in.
添加清单10中的代码将数据读回并更改呈现的信息。
Add the code shown below in Listing 10 to read the data back in and change the presented information.
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.
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