首先，元素应该为文本格式，因此我们可以创建这样一个无编号的列表元素：[ "ul" ]。

For a start, any element should be text, so you can create an un-numbered list element like this: [ "ul" ].

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需要创建选项的列表（在选项之前或之后加一个编号），还要提供接收所选编号的功能。

You need to create a list of options (with a number before or after them), followed by the functionality to accept a number for listening.

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