这意味着它是一个使用符号来描述数据的数组。

This means it is an array using symbols to describe the data. An addition, for instance, would look like this.

youdao

这是一个常用的控制器，顾名思义，它有一个存储视图所需的模型数据的数组。

This is a commonly used controller that, as the name suggests, has an array that holds the model data needed for the view. All you need to do is provide the data for the controller and handle sorting.

youdao

youdao