Why do people use PDF instead of EPub in edu and gov?
@Acer 后者有时候需要签名和数字证书之类的玩意，这些功能好像不属于epub考虑的范围。
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@Acer 后者有时候需要签名和数字证书之类的玩意，这些功能好像不属于epub考虑的范围。