Class view folders offer an alternate view of selected symbols in your projects.
“类视图”文件夹提供了项目中选定符号的替换视图。
Each of the folders can be further expanded to view an enumeration of the contained database objects.
每个文件夹可以进一步展开，以查看列举出的所包含的数据库对象。
You may also notice that, in the tree view, we are seeing both folders and files.
您可能还注意到：在树视图中，我们同时看到了文件夹和文件。
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