He is working at the pithead.

Sexual intercourse is one of the basic human desires.

They were having sex in secret.

He repeated trial and error to create a new recipe.

The power distribution system in this area is very efficient.

This company is distributing electricity nationwide.

This old battery is no longer usable.

The electrolytic capacitor is an important part of electronic equipment.

He does exercises to train his gluteus muscle every day.

We decided to install a personal electricity generation system.