You will also learn how to limit the user's choice of search parameters by placing a combo box on the page: this presents a list of selections to the user instead of allowing them to type in a string.
通过在页面上放置一个组合框，您可以限制用户对搜索参数的选择：组合框将向用户提供一组固定的选择，而不是任由他们直接输入一串字符。
After you save your changes in the dialog box, Eclipse is updated with your new selections.
将对话框中的修改保存后，将使用新的参数选择更新eclipse。
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