That is my personal issue.

We are going on a trip together.

I lost my precious belongings.

He learned the movements of the solar system using an orrery.

The place of articulation is a very important concept in phonetics.

The potential energy of this ball is proportional to its height.

His usual location is the seat at the very back of the library.

There are many historical buildings in the central part of this city.

He should stop his selfish behavior.

We chose Kyoto as the center of our trip.