He is known as a pioneer in that field.

In that area, there have been reports of a deviant appearing recently.

He became the loser in the game.

My father is a doctor.

This product is designed to meet the needs of the purchaser.

He became a pauper overnight.

Who is the user of this software?

An old person was playing with his grandson in the park.

The observer recorded the phenomenon in detail.

He, as a newcomer, quickly adapted to the team.