Listing 3 shows the code developed for the top content pane, which will contain a heading and instructions.

列表3显示了开发顶部内容窗格所用的代码，它将包含一个标题和一个指南说明。

youdao

Listing 3 shows the code developed for the top content pane, which will contain a heading and instructions.

列表3显示了开发顶部内容窗格所用的代码，它将包含一个标题和一个指南说明。

youdao