另外两个框是属性列表（分别为作者和标记），用户可以对其进行选择，以便将输入进一步缩小范围到只包括匹配的那些。

The other two boxes are lists of properties (author and tag, respectively) the user can select to narrow down the entries to only those that match.

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创建一个如列表2所示的Differences logger类，并添加一些属性到这个类。

Create a Differences Logger class as Listing 2 shows and add a few attributes to the class.

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如果您希望将列表属性绑定到页面上的任何控制中去，就需要提供每个列表属性的数据类型。

You will need to provide the data type for each of the list attributes if you will be binding them to any control on a page.

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