He is an expert in dynamics.

He is an expert in dynamics, helping to solve complex problems in physics.

Understanding the principle of electromagnetic induction is very important in learning physics.

My father drives a truck.

The fire truck went into action because of the fire.

He publicly disclosed that he has a gender identity disorder.

The motto of this team is 'one for all, all for one'.

There is a proverb that says, 'Plan your day in the morning and your year on New Year's Day,' which means that you should plan your day in the morning and your year on New Year's Day.

He likes to read The Arabian Nights.

The thirty-first day is my birthday.