He is playing the character of Kyu in the play.

This is my salary.

What time does the next semi-express train come?

I recently met a middle school classmate of mine on the train.

He is an old acquaintance.

The shrine is a traditional Japanese building.

I hope our love will be eternal.

He is our class representative.

The steepest descent method is one way to solve optimization problems.

He is an expert in geophysics.