He is a very active person.

Action potential is an important mechanism for nerve cells to transmit information.

He is actively participating in social movements.

He is passionately engaged in extracurricular activities.

Every Sunday, we look forward to hearing the beautiful singing of the choir at the church.

The regiment of military policemen is working to maintain public order in the city.

The fire brigade quickly extinguished the fire.

He is a member of the U.S. Marine Corps.

The security team is guarding the bank all night.

He was executed by a firing squad.