He suddenly made an unexpected phone call to my house.

The structure of the metal gradually weakens due to electrolytic corrosion.

I reported to the police using the gray phone.

The light in the room suddenly went out, and it became pitch dark.

This old television still works.

He saw ball lightning bouncing from the window.

He finished his work at a devilish speed.

I bought a new electric drill.

How much is the electric flux of this coil?

Her decorated mobile phone is very colorful and unique.