These protection features are just switches to prevent accidential action. The features are not intended to provide any secure protection. For example, by exporting a sheet to another file format, a user may be able to bypass the protection features. There is only one secure protection: the password that you can apply when saving an OpenDocument file. A file that has been saved with a password can be opened only with the same password.
这些保护功能只是防止意外操作的开关。这些功能并不能提供任何安全保护。例如，将工作表导出为另一种文件格式，用户可能会略过该保护功能。只有一种安全保护：当您保存 OpenDocument 文件时使用的密码。一个使用密码保存的文件只能通过相同的密码才能打开。