He is a renowned scientist who has made many discoveries.

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 has a deep interest in paleozoology.

He is writing a thesis on paleogeography.

He is an expert in paleoecology, pouring his passion into studying past ecosystems.

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

He went to America as an international student.

My older brother is attending a college in Tokyo.

I am majoring in microbiology at university.