He is majoring in hydrology at university.

He is the type of person who can distinguish between good and bad.

We should always remember the power of Kannon in difficult times.

There is a park near my house.

Einstein proposed the theory of relativity.

His actions always have a duality.

My younger brother caught the influenza.

This material has high corrosion resistance.

The prevention of venereal diseases is most important in safe sexual behavior.

This equation has homogeneity.