He learned about the structure of society in his civics class.

He is an expert in enzymology and has conducted many studies in that field.

He is an expert in enzymology and conducts many researches.

We are planning to go to the science museum tomorrow.

We are planning to go to the science museum this weekend.

He is an expert in gemology, and he is good at evaluating the quality of diamonds.

He is an expert in aerodynamics.

I like listening to classical music.

His theory is widely recognized in the scientific community.

In my school, the wind orchestra club is very popular.