对于前两种情况，你只能用简易型音频或视频无线器来演示文稿，这时你需要一份打印稿。

For the first two, you may have no choice but to go with an av free presentation, so have a printed copy of your notes with you.

youdao

在已有无线温湿度传感器网络硬件平台的基础上，设计了一种无线传感器网络演示软件。

Based on the accomplished hardware platform for wireless temperature and humidity sensor network, a sort of demo software for wireless sensor network is designed.

youdao