He values his private life.

He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

He holds a personal grudge against me.

Using the private railway makes commuting very convenient.

I am very interested in natural science.

I am majoring in information science.

He solved the problem in a scientific way.

He has a wealth of scientific knowledge and is always excited about new discoveries.

Earth science is an important field of study for unraveling the mysteries of nature.