Message in Chinese (Simplified) (中文(简体))
无法针对活动“<var>X</var>”修改 "Activities" 集合。请将属性 "CanModifyActivities" 设置为 "True"。
Unlocalized message
Cannot modify 'Activities' collection for the Activity '<var>X</var>'. Set the property 'CanModifyActivities' to 'True'.
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