He explained in detail about the structure of the sphenoid bone.

This butterfly valve is used to control the flow of fluid.

This orrery accurately reproduces the movements of the planets in the solar system.

He lost his sense of smell due to damage to his olfactory nerve.

He was arrested for a minor offense.

I am majoring in computer science at university.

He is majoring in geomorphology at university.

Recently, my neuralgia has been so bad that I can't concentrate on my work.

Learning Japanese honorific language is difficult.

He is majoring in statistics at university.