当在被追踪的表上面发生了dml事务的时候，这个进程存储行的前镜像到闪回数据归档里面。
When a transaction containing DML on a tracked table commits, this process stores the pre-image of the rows into the Flashback Data Archive.
根据在创建模板前该镜像被使用的情况，此镜像有可能会包含用户并不愿意公开的内容。
Depending on how the image was used before creating a template from it, it could contain data that the user doesn’t wish to make public.
大约10年前在猕猴大脑中发现了镜像神经元，这给神经科学界带来了冲击。
The discovery of mirror neurons in the brains of macaques about ten years ago sent shockwaves through the neuroscience community.
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