The reason it's so huge is simple: OOXML is essentially a complete replication of every chunk of data that a Microsoft Office application might possibly save in a file.
该标准之所以如此庞大，是因为OOXML 几乎完全复制了MicrosoftOffice应用程序在文件中可能保存的所有数据块。
This file represents the customer data from a branch office of the bank.
该文件表示来自银行分支机构的客户数据。
This file represents the customer data from a branch office of the bank.
该文件表示来自银行分支机构的客户数据。
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