Thermochemistry is a branch of chemistry that studies the interaction of heat and matter.

Photochemistry is a branch of science that studies how chemical reactions proceed under the influence of light.

I am majoring in Korean studies at university.

He is an expert in pomology and has contributed to the improvement of many fruit varieties.

He is a famous philosopher, influencing many people.

He is a famous osteologist, studying many fossils.

Mr. Sumikisiko has a rare name, doesn't he?

Korumbia is my best friend.

He is exactly in the state of 'A frog in a well does not know the vast ocean.'

He spoke of his big dreams, saying, 'How can a sparrow understand the ambitions of a swan?'