Trolley buses are very convenient as a means of urban transportation.

Electromagnetic radiation conveys energy in forms such as light and radio waves.

My father drives a truck.

He is wearing an undershirt.

The freight train passed through the station.

This product is made of high-quality silicone resin.

I need to buy a new mattress.

I made a mistake.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

The 24-cell is one of the geometric shapes in four dimensions.