The source system must be in a consistent state before you make the copy.
在复制之前，源系统必须处于一致状态。
Upon completion of a successful transaction, the data will again be in a consistent state.
事务成功完成后，数据将再次处于一致状态。
Upon completion of a successful transaction, the data will again be in a consistent state.
事务成功完成后，数据将再次处于一致状态。
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