2 sentences for 演示 (yǎn​shì — to demonstrate)

1. 让我给你演示这个设备是如何工作的。

   ràng wǒ gěi nǐ yǎn​shì zhè​ge shè​bèi shì rú​hé gōng​zuò de.

   Let me show you how this device works.

   Source: OpenSubtitles

2. 以后，您可以打印笔记并在演示时参考。

   yǐ​hòu, nín kě​yǐ dǎ yìn bǐ​jì bìng zài yǎn​shì shí cān​kǎo.

   Later, you can print your notes and refer to them when you give your presentation.

   Source: CCMatrix