The update is free and can be downloaded from the Visual Studio Gallery.
这个更新是免费的，可以从 Visual Studio库中下载。
There are four levels of visual function, according to the International Classification of Diseases -10 (Update and Revision 2006)
根据《国际疾病分类-第十版》（2006年更新和修订），视力的好坏可分为四个档次
NuGet is a Visual Studio 2010 extension that makes it easy to add, remove, and update libraries and tools in Visual Studio projects that use the.net Framework.
NuGet是一个Visual Studio 2010扩展，它使得在使用。NET Framework的Visual Studio项目里添加、删除和更新库和工具变得更加容易。
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