有人可以帮我吗?

Can someone help me on this?

并非所有的上下文菜单都可以使用功能区UI进行自定义(即Outlook扩展性模型不为此提供必需的ID).请参见在Outlook 2010中扩展用户界面进行可能的自定义.

Not all context menus can be customized by using the Ribbon UI (i.e. the Outlook extensibility model doesn't provide required IDs for that). See Extending the User Interface in Outlook 2010 for possible customizations.

发布后，它可以用于Outlook 2010吗?还是我需要使用相同的代码创建Outlook 2010项目?

After I publish it, can it be used for outlook 2010? Or I need to create the outlook 2010 project with the same code?

否，不需要创建新的外接程序项目.您可以在Outlook 2010中运行此加载项.使用Visual Studio 2013，Visual Studio 2012或Visual Studio 2010创建的解决方案可以在Office 2013，Office 2010或2007 Microsoft Office system中运行.但是，该解决方案只能使用Office的所有三个版本中可用的那些功能和API.您可以在在不同版本的Microsoft Office中运行解决方案中阅读有关此内容的更多信息. > MSDN中的文章.

No, there is no need to create a new add-in project. You can run this add-in in Outlook 2010. Solutions that were created by using Visual Studio 2013, Visual Studio 2012 or Visual Studio 2010 can run in Office 2013, Office 2010, or the 2007 Microsoft Office system. However, the solution can use only those features and APIs that are available in all three versions of Office. You can read more about this in the Running Solutions in Different Versions of Microsoft Office article in MSDN.