下面简述了有关如何帮助保护项目文件及其对象的策略，这些策略大致按安全级别排列。
Strategies to help protect your project file and its objects are briefly described below, and roughly arranged by levels of security.
下面简述了有关如何帮助保护项目文件及其对象的策略，这些策略大致按安全级别排列。
Strategies to help protect your project file and its objects are briefly described below, and roughly arranged by levels of security.
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