一些IT专业人士认为，重复数据删除和单实例存储（SIS）是一回事，但其实并非如此。
Some IT professionals think that deduplication and Single Instance Store (SIS) are the same thing, but they are not.
消息可以存档的次数1——使用单实例存储(SIS)。
Number of times message can be archived 1 - Using single instance store (SIS).
如果激活了commonstore单实例存储(single - instance - storage,SIS)算法，那么应确保所有邮件各不相同，并且没有存储在储存库中。
If you have the CommonStore single-instance-storage (SIS) algorithm activated, make sure that all mails are different and not yet stored in the repository.
单实例对象Message作为message类的元存储库和工厂类。
The Message singleton serves as a metadata repository and factory class for the Message class.
单实例对象Message作为message类的元存储库和工厂类。
The Message singleton serves as a metadata repository and factory class for the Message class.
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