按钮，您可以点击向前或向后通过您的介绍。

Buttons that you can click to move forward or backward through your presentation.

youdao

用于一次向前导航一段内容的按钮。

A button for navigating forward one piece of content at a time.

youdao

用于一次向前导航一段内容的按钮。

A button for navigating forward one piece of content at a time.

youdao