He is engaged in the geological investigation of that area.

The police investigated the scene.

We conducted an investigation on that issue.

He is engaged in the medical industry.

He is engaged in the medical industry.

In my area, a summer festival is held every year.

The geology of this area is very unique.

His perception was sharp, and he immediately saw through the lie.

He deeply considered the problem.

The police are conducting an investigation at the scene.