The police investigated the scene.

He is engaged in the geological investigation of that area.

We conducted an investigation on that issue.

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

He is engaged in the medical industry.

He is engaged in the medical industry.

The police are conducting an investigation at the scene.

The geology of this area is very unique.

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

He deeply considered the problem.