In Japan, husband and wife retaining different surnames is not yet recognized.

My father likes to tell dad jokes.

This old house is covered with thatch.

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

It is important to learn about the prevention and treatment of the human immunodeficiency virus.

He smashed his face into the keyboard and typed 'asdfghjkl'.

Steam is rising from this pot.

I thought his behavior was strange.

He wrote his name using the character for 'work'.

I couldn't see anything in the dark room.