He is majoring in chemistry at university.

He is a professor of physics.

The theme song of this movie is very moving.

We are planning to go to a theme park this weekend.

He is an expert in chemistry.

The content of this book is very high quality.

He pawned his watch to get money.

It is important to understand the importance of health.

This is my first question.

This electrolyte improves the performance of the battery.