除了使排序按类型有点更加一致，这还意味着在反转排序顺序时，每种类型内的项目就还逆页序。
In addition to making sorting by Type a bit more consistent, it also means that when you reverse the sort order, the items within each Type also reverse order.
例如，您可以反转list中的所有条目或排序list。
For example, you can reverse all the items in a list or sort a list.
因此，在前面的例子中，unsorted _ list中的列表还可能被进行排序或反转顺序。
So, in the previous example, the list in unsorted_list would also be sorted and reversed.
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