The way you should read diagrams like this is as a graphical representation of operation application on two documents at the same time.
应该这样解释这幅图，它是在同一时间两份文档上的操作应用的图形化代表。
The way you should read diagrams like this is as a graphical representation of operation application on two documents at the same time.
应该这样解释这幅图，它是在同一时间两份文档上的操作应用的图形化代表。
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