You can add new keys and remove keys (in the upper table), and create or change the bindings of any key, as well as remove a binding (in the lower table).

您可以(在上方的表中)添加新键并移除已有的键，创建或更改任意键的绑定，以及(在下方的表中)移除一个绑定。

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In any case, you can add and remove keys (on the left side of the editor) and create or change the bindings of any key, as well as remove a binding (on the right side of the editor).

在任何情况下，您都可以添加和删除键(编辑器左侧)，以及创建或更改任何键的绑定关系(编辑器右侧)。

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As you play with SQL data binding and add books and authors (which you should absolutely do), you can update this class to remove those entries.

利用SQL数据绑定可以添加图书和作者(绝对应该这样做)，与此类似，也可通过更新类来删除这些记录。

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