Understanding chemical equilibrium is very important in understanding chemical reactions.

The monthly fee for this service is 5000 yen.

Earth science is a part of natural science that studies the physical and chemical structure of the earth.

He decided to take a leave of absence from school for health reasons.

He is an expert in pharmacology.

The new school building has been completed.

He learned Japanese through self-study.

He taught himself programming.

Bugaku, the ancient court ritual dance of Japan, fascinates with its beauty and mystique.

He has a deep interest in the study of ancient Japan.