Now, what subcategories might be under these topics?
那么，现在这些话题下面的子种类会有哪些呢？
Within each category, there are several subcategories.
而每一个类别中有多个子类别。
This method also blanks out the list of subcategories being displayed.
这个方法还会将正在显示的子类清单置空。
Within the two major categories of collections are several subcategories.
两个主要的集合分类下还有一些小分类。
This category contains 3 subcategories that focus on memory, profiling, and speed.
这一类别分为三个子类，分别关注于内存，性能分析和速度。
He is then using client side scripting to show the subcategories under the main category.
他然后使用客户端脚本显示的主要类别下的子类别。
He is then using client side scripting to show the subcategories under the main category.
他然后使用客户端脚本显示的主要类别下的子类别。
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