The menubar attribute declared in the Frame object in Listing 3 has a menubar object as its value.
在清单3中，Frame对象中声明的menubar属性的值为一个menubar对象。
Menubar is a ZK menubar component with two child ZK menuitem components with the IDs add and exit.
menubar是ZK menubar组件，有两个子zkmenuitem组件，ID是add和exit。
Menubar is a ZK menubar component with two child ZK menuitem components with the IDs add and exit.
menubar是ZK menubar组件，有两个子zkmenuitem组件，ID是add和exit。
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