She started doing yoga to balance her autonomic nervous system.

The sympathetic nervous system controls the body's stress response.

He is a person of strong vanity who reads self-improvement books.

He decided to start a manual labor job.

Let's cherish every encounter with the spirit of 'once in a lifetime'.

Life is a series of ups and downs.

He does his work perfectly, dotting the i's and crossing the t's.

I conducted an interview in a question-and-answer format.

A white dwarf is a celestial body that a giant star becomes at the end of its life.

A brown dwarf is a celestial body that has a size between a star and a planet.