I am majoring in embryology at university.

He is majoring in psychology at university.

He is specializing in physics.

He is an expert in embryology, studying the developmental processes of many kinds of organisms.

I will enter a university in Tokyo next year.

He took a deep breath and then vocalized strongly.

He practices vocalization every day.

He practices every day to pronounce accurately.

He practices vocalization every day.

Predicting the occurrence of earthquakes is difficult.