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 weekend, I do volunteer work at a local shelter.

He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

Using the private railway makes commuting very convenient.

We respect Japanese culture.

We are going on a trip tomorrow.