He published his own collection of poems.

The battery has run out, so I have to go buy a new one.

Let's start the meeting according to Korea Standard Time.

This eigenfunction is one of the fundamental concepts of quantum mechanics.

He is feeling solitude.

The human immunodeficiency virus destroys the immune system, causing the body to lose its ability to fight disease.

The human immunodeficiency virus is the virus that causes AIDS.

The human immunodeficiency virus destroys the immune system, making the body unable to fight disease.

Hitori is my best friend.

I would rather go alone.