He is world-famous as a comparative linguist.

Natural language understanding is an important field of artificial intelligence.

He is attending a programming school to learn object-oriented languages.

He is good at writing school essays about his impressions of a book.

Reading this biscriptal kanji-kana text is difficult.

He has a deep interest in astronomy.

He is an expert in physics.

Electromagnetism is a part of physics that studies the interaction between electricity and magnetism.

He is good at solving geometry problems.

He is an expert in toxicology and conducts many studies.