The two trees behave identically, but they have different purposes.
这两个树的行为完全相同，但是它们有不同的目的。
Functionally, these two filters will behave identically. However their performance can be quite different.
这两个过滤器的行为在功能上是完全一样的，但它们的性能可能相差很大。
In this article, we will address the user tree only, keeping in mind that the user and system trees behave identically.
在本文中，我们将只针对用户树，要记住用户和系统树的行为是一样的。
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