power point.

例句：

1. 1. The teacher gave a power point presentation on the history of the country.
   老师做了一个关于该国历史的演示文稿。
2. 2. She used her laptop to create a stunning power point for her presentation.
   她用她的笔记本电脑制作了一个精彩的演示文稿，准备她的演讲。
3. 3. During the presentation, the speaker used PowerPoint to illustrate key points.
   在演讲中，演讲者使用PowerPoint来说明关键点。