When the mouse pointer is no longer over the item, you want the dialog to be hidden (a hide action).
当鼠标指针离开条目时，你想隐藏这个对话框(hide行为)。
When the user moves a mouse pointer over an item, you want the content of the dialog to update (a get action) and the dialog to show (a show action).
当用户鼠标指针经过条目上时，你想更新对话框内容(get行为)并且显示这个对话框(show行为)。
This event is typically raised when the user places the mouse pointer over the menu item.
当用户将鼠标指针放在菜单项上时，通常会引发此事件。
The item text changes color as the user moves the mouse pointer over the item.
使用者将滑鼠指标移至项目上方时，项目文字会变更色彩。
This event is typically raised when the user rests the mouse pointer over the menu item.
当用户将鼠标指针停放在菜单项上时，通常会引发此事件。
This event is typically raised when the user rests the mouse pointer over the menu item.
当用户将鼠标指针停放在菜单项上时，通常会引发此事件。
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