While you might choose to have separate packages for grouping related classes in a real-world plug-in, in this case, there will be only two classes, so there's no need.

尽管在实际的插件中，您可以选择用不同的包对相关的类进行分组，但在本例中，只有两个类，所以不必这样做。

youdao

Separate the responsibilities into two different classes, such as.

拆分职责到两个不同的类中，如。

youdao

To more cleanly separate the DAL- and BLL-related classes, let's create two subfolders in the App_Code folder, DAL and BLL.

为了更加清晰的区分DAL和BLL的类，我们在App_Code文件夹中建立两个子文件夹，分别命名为DAL和BLL。

youdao

If historical correlations are low enough, we separate two indexes into different asset classes.

FORBES: Asset Allocation and the Efficient Frontier