You can't smell a radio wave.

你闻不到无线电波。

You can't touch a radio wave.

你摸不到无线电波。

You don't see a radio wave.

你看不见无线电波。

A radio wave is of the same family as heat waves, light waves, X-rays and gamma rays.

无线电波与热波、光波、X射线和伽马射线一样都属于同一族系。

On top of the hill stands a metal tower which is used to send and receive radio wave.

山顶有一个铁塔，用来发送和接受无线电波的。(主语太长)。