Obviously whiteboards require markers and erasers.

当然，白板需要有配套的马克笔和板擦。

Use simple tools such as index cards and whiteboards.

用简单工具，譬如索引卡和白板。

A new system that lets people enter data into a tablet computer simply by drawing diagrams on the screen could lead to interactive whiteboards.

只要在屏幕上画出图表就能在平板电脑上输入信息，这个新系统可以发展成为互动性白板。