He solved complex mathematical problems using his new calculator.

My father is an aircraft pilot.

He works as a fighter jet pilot.

In psychology, it is important to understand the mechanism behind human behavior.

This engine is old, but it still works.

I separated the sample using a centrifuge.

The space probe discovered a new planet.

I bought a train ticket at the ticket machine.

He searched for metal using a new detector.

I have an emergency generator at my house.