除了视图之外，每个透视图还可以在适当的地方有不同的工具按钮和菜单选项。
In addition to views, each perspective can have different tool buttons and menu selections as appropriate.
第二个选项卡 Update Status，包含一个具有文本区域和按钮的 HTML 表单。
The second tab, Update Status, contains an HTML form with a text area and button.
它将在用户没有为配方和用法选择有效的选项就单击Search按钮时跟踪null或空值。
They basically trap for null or empty values in the event that the user clicks the Search button without selecting valid options for both usage and configuration.
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