在上述代码中，父类的构造函数接受一个参数，一个表示布局的整型参数。
In the code above, the constructor of the parent class takes one argument, an integer representing the layout.
MXML是一种基于XML的声明式语言，用来表示UI布局和行为，并且每个MXML文件都是一个单独的组件。
MXML, a declarative XML-based language, is used to represent UI layout and behaviors, and each MXML file is a separate component.
Bar-Joseph表示，在这样的布局当中，果蝇有足够的特化细胞，但是他们彼此并不相邻。 这与分布性网络的分工方式相似。
This layout, where there are enough specialized cells, or leaders, but no two are right next to each other, is very similar to how tasks are divvied up in distributed networks, says Bar-Joseph.
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