注意：该备份文件的大小可以会比你的主项目文件要大。

Note: The size of the backup file might be larger than that of your main project.

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所有本地project . xml文件既可以在主项目中覆盖这些属性的设置，也可以为单个子项目定义新的或特殊的设置。

All local project.xml files can either override the properties set in the main project or they can define new or special Settings for the individual sub-project.

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