ACL binding level defines where to pick the ACL from at runtime. These are defined while creating the item type.

ACL绑定级别定义了在运行时对哪些内容应用acl，这些绑定都是在创建项目类型时定义的。

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For: Iterates through an input sequence, binding a variable to each input item in turn.

for：对输入序列进行迭代，依次将一个变量绑定到每个输入项。

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The last item on the Data Binding section specifies an attribute that is used when displaying a collection of data.

Data Binding 部分的最后一项，指定了显示数据集时使用的属性。

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