It provides an event handler for each menu option.

它为每一个菜单选项提供事件处理程序。

youdao

Designer verbs associate a menu item with an event handler.

设计器谓词使菜单项与事件处理程序关联。

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Designer verbs associate a menu item with an event handler.

设计器谓词使菜单项与事件处理程序关联。

youdao