His advice was very practical.

His target-like way of thinking is hard to understand.

He always proactively suggests new ideas.

This allele greatly affects the inheritance of color vision.

The Ministry of Education is responsible for Japan's educational policy.

My father is an expert in otolaryngology.

He is an expert in computer science.

He is interested in phrenology.

He is interested in ancient mathematics.

I am majoring in parasitology at university.