This can be subdivided into four main sub-categories.

这种模式可以被分成四种主要的子模式。

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Which categories are the top-level categories, and which are sub-categories?

哪些类别是顶级类别，哪些是子类别？

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This is common with retailers where you can navigate through a hierarchy on their Web site to see the products within various categories and sub-categories.

这是零售商常用的方法，您可以在其网站上导航整个层次结构来查看位于不同类别和子类别的产品。

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The opposition would split Category Two loans into five sub-categories with strict provisioning levels for each.

ECONOMIST: Bruised, battered and broke

The large sub-categories are Social Security, Medicare, Medicaid and various forms of public assistance (food stamps, housing support, etc.).

FORBES: Federal Spending Up, Employment Down

The allocation is further divided into sub-categories for more diversification, such as U.S. equities, international equities, Treasury bonds, corporate bonds, etc.

FORBES: Earn More with Index Funds in 2013 and Beyond